Apple Inc. AAPL, +1.57% is widely expected to unveil its iPhone 6S and iPhone 6S Plus models as well as a more expensive, souped-up Apple TV with Siri capabilities at its hardware event scheduled for later Wednesday.

The company may also introduce its largest iPad yet, but analysts are divided over whether that announcement will come next Wednesday or if Apple will wait until October.

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Here’s what to expect from the event — headlined “Hey Siri, give us a hint” — and what it means for the stock price:

See also: When is the Apple event, and what’s expected to happen?

iPhone

Think of the iPhone 6S and iPhone 6S Plus as an iPhone 6 with “meaningful updates under the hood,” said FBR analyst Dan Ives. It likely will have the same basic hardware design as the iPhone 6 and iPhone 6 Plus models, but come with a faster A9 processor and an improved 12-megapixel rear-facing camera, said Brean Capital analyst Ananda Baruah.

Ives also expects the upgraded iPhone 6S models to come equipped with Force Touch, an input button with haptic feedback that has been rolled out on the Apple Watch and new MacBook trackpads.

Force Touch could add a new dimension to the phone by using tiny electrodes that not only recognize touch, but also force. It will enable developers to design a host of new features that can be unlocked depending on how forcefully the user presses down. And while it may take some time to get used to, Apple is calling Force Touch the “most significant new sensing capability” since Multi-Touch, the technology that has long powered the iPhone touch screen.

With iPhone expectations higher than ever, Ives expects Apple to deliver superior updates for the iPhone 6S than it has with previous S-model phones in the past.

“We view this as a critical event for Apple to help turn the negative investor tide and help lay out its growth vision for the next year on the heels of the iPhone 6 super-cycle product tailwinds,” Ives said.

Apple TV + Siri

One of the sexiest new devices expected this fall is the latest generation Apple TV, which 9to5Mac.com reported this weekend could carry a starting price of either $149 or $199 — more than double its $69 predecessor, whose price was reduced from $99 this March.

The higher price suggests the fourth-generation Apple TV would likely be much more advanced, running iOS 9, featuring new Siri capabilities and offering a dedicated App Store.

Last week, TechCrunch reported Apple was developing a wireless motion controller, which could enable developers to build unique games for Apple TV that could compete with existing game consoles, such as Microsoft Corp.’s Kinect MSFT, +2.40% .

The TV box would be suited up with software that would enable the device to absorb Apple’s rumored streaming TV service. Apple is expected to unveil a subscription streaming service with a bundling of TV channels for $40 a month starting in 2016.

Piper Jaffray said the event’s headline, with its reference to Apple’s voice-activitated assistant Siri, signals that Apple could unveil some kind of increased hands-free functionality for Siri, potentially related to Apple TV. While Piper Jaffray analyst Gene Munster said the inclusion of Siri in Apple TV would “itself be a major upgrade that would extend Siri beyond its current duties,” he thinks the ability to also have “passive listening” might give Apple an edge in home automation, which could extend the capabilities of HomeKit.

iPad

Another device that is widely expected this fall is a 12.9-inch iPad, which Apple would likely use to target the enterprise sector. The jumbo tablet would likely come with Force Touch as well as an upgraded camera and screen that might attract creative enterprise uses, analysts said.

The larger iPad comes as Apple grapples with declines in tablet demand as people migrate to larger-screen iPhones. The Cupertino-based company has been trying to offset the deceleration by expanding tablet use in corporate settings, particularly through its partnership with IBM Corp. IBM, +0.21% , which has been developing industry-specific iOS apps.

However, analysts are mixed on whether this announcement will be made next week, and many think the company could wait to update the iPad and debut any upgrades with the Apple Watch at a later hardware event in 2015. Apple has a history of hosting a second hardware event in October, and the iPad Mini, iPad Air and 9.7-inch iPad Air 2 were all unveiled in October.

Stock Reaction

The hardware event is important for Apple as it works to squelch concerns regarding a slowdown in iPhone sales. Its shares have slumped nearly 13% over the last three months, compared with a 7.8% decline for the broader Dow Jones Industrial Average. However, they are up nearly 11% over the last 12 months, outperforming the Dow Industrials’ 3% decline.

The company is heading into a period of tough year-over-year comparisons for the iPhone, given the huge demand for a larger-screen iPhone around this time last year, when Apple introduced the iPhone 6 Plus.

However, FBR’s Ives thinks there is still room for this upgrade cycle to continue, perhaps buoyed by the new “under the hood” features of the iPhone 6S.

“We believe Apple is still in the middle innings of taking share across many geographies,” said Ives.