At the Qualcomm Snapdragon Tech Summit in Maui today, Microsoft and Qualcomm announced Always Connected PCs, Windows 10 computers that can turn on instantly, offer built-in LTE connectivity, and feature battery life measured not in hours but in days. Partners Asus and HP announced the first Windows 10 devices powered by Qualcomm Snapdragon chipsets: the Asus NovaGo and the HP ENVY x2. Lenovo is also working on its own Always Connected PC, but the company isn’t yet ready to share details.

If this sounds familiar, it’s because Microsoft has tried running Windows on ARM before with its Surface RT tablet running Windows RT. That project was largely a failure, but the company is trying again.

A year ago, Microsoft said it was working with hardware partners to build Windows 10 computers powered by Qualcomm chipsets. At Build 2017 in May, a session showed off Windows 10 running on ARM with support for existing Win32 apps (unlike Windows RT, which only worked with apps specifically compiled for the OS), but otherwise there were very few updates. Now, Microsoft is finally ready to talk, and let its partners show off devices. But they’re still not quite ready — general availability is slated for next year.

Still, Microsoft and Qualcomm want to talk about the three features that Always Connected PCs boast over other computers:

The screen turns on “instantly” whenever you pick up the device. Unlike other Windows 10 PCs, you never have to wait for it to wake up.

Built-in LTE means you are online everywhere you have cellular service. Anywhere your phone has data, your PC is also connected.

Battery life that lasts days means you can charge your PC as little as once a week, and not have to carry around power cords.

Microsoft has worked closely with Asus, HP, and Lenovo to “push the boundary of a Windows PC,” Matt Barlow, Microsoft’s corporate vice president of Windows and devices, told VentureBeat. Barlow noted that these are truly Windows 10 computers that have everything you would expect: Start Menu, Windows Hello, File Explorer, Paint 3D, Office, Minecraft, and so on.

These devices ship with Windows 10 S first, though users will be able to upgrade to Windows 10 Pro for free. Microsoft didn’t share a timeframe for when that upgrade will end, but it’s likely to be for a limited time, like with the Surface Laptop.

Asus and HP

Asus is describing the 13.3-inch NovaGo (TP370) as the world’s first Gigabit LTE-capable laptop. It is powered not just by the Qualcomm Snapdragon 835 Mobile PC platform, but also features a Gigabit Snapdragon X16 LTE modem and a built-in eSIM. Asus is promising up to 22-hour battery life and over 30 days of standby.

The Asus device, which will start at $599, is frankly the more interesting of the two, and the company has shared the full specifications:

Processor: Qualcomm Snapdragon 835

Operating system: Windows 10 S

Display: 13.3-inch Full HD (1920 x 1080) resolution with capacitive multi-touch

LTPS display, LED-backlight, and 100% sRGB and 72% NTSC color gamut

LTPS display, LED-backlight, and 100% sRGB and 72% NTSC color gamut Graphics: Qualcomm Adreno 540 710MHz

Cameras: 1MP HD (1280 x 720) front camera with 3P, f/2.0 aperture lens

Memory & storage: 4GB / 6GB / 8GB RAM, 64GB/ 128GB / 256GB UFS 2.0

Connectivity: 802.11a/b/g/n, 2×2 802.11ac MU-MIMO, Wi-Fi Direct, Qualcomm Snapdragon X16 modem (Gigabit LTE with DL: 1Gbps, UL: 150Mbps)

Interface: 2x USB 3.1 Gen 1 Type-A, 1x audio jack: headphone / mic-in, 1x combo Nano SIM (tray with needle), 1x microSD card reader slot (supports up to 256GB), 1x HDMI, and

1x DC in

1x DC in Audio formats: 2x high-quality stereo speakers with smart amp

Battery: 52Wh lithium-polymer battery

Size: 316 x 221.6 x 14.9mm

Weight: 1.39 kg

HP, meanwhile, says the 12.3-inch ENVY x2, shown above, combines the best of a smartphone experience with the best of a Windows PC, promising the world’s longest battery life in a Windows detachable. That translates to battery life up to 20 hours and up to 700 hours (over 29 days) in standby.

Both companies will be announcing more details in terms of pricing, mobile carriers, and exact availability next year. Asus is aiming for a Q1 2018 release while HP is targeting Spring 2018.