Vizio got its start as a purveyor of cheap HDTVs just as consumers started upgrading their aging standard definition sets. But something surprising happened: they also ended up building pretty great TVs, especially in recent years. Vizio managed to keep its prices low while delivering sets with full-array backlighting, which let TVs light up the portions of screens they need to, while keeping other areas dark. That ensured improved black-levels and contrast, without the uneven lighting you see on edge-lit screen -- Samsung and other TV makers still rely on this setup heavily. With its 2018 TVs, Vizio is aiming to deliver even more "local dimming" zones.

The flagship 65-inch P-Series Quantum ($2,300), for example, sports a whopping 192 zones, compared to "just" 100 from similarly-sized standard P-series model. Those extra local dimming areas let the Quantum model reach 2,000 nits of peak brightness, which is among the highest I've ever seen from a TV. The differences between the two P-series sets were easy to see in our brief demo. Footage on the Quantum TV looked noticeably brighter, and due to that, also sported a better contrast ratio.

That's not to say the standard P-series looks bad -- it's still superior to most other LCD TVs -- it's just lost a bit of its luster. In fact, aside from a new case with three thin bezels, it seems like Vizio hasn't changed much since the 2016 P-series. As I said last year, that's mostly a testament to how good that TV was in the first place.

The Quantum TV, not surprisingly, gets its name from Quantum Dot technology, the same thing Samsung has been using on its QLED sets. It's capable of delivering a wider color gamut than any of Vizio's other TVs, and that was also noticeable during my demo. Neon imagery and city skylines were lush with color -- they seemed a tad more "alive" than the same footage on the P- and M-series TVs. Vizio is also going for a classier hardware look with the Quantum model, with a near bezel-less design. It's an impressive TV in all respects, but it'll also have to compete with LG's 65-inch OLED sets, which start at $2,600 and deliver superior contrast and black levels. (OLEDs don't have to worry about local dimming zones, since each of their pixels can be turned on and off independently.)

Even if you don't want Vizio's highest-end TV, though, it's still a useful product for shoppers since it drives the cost of the company's other sets lower. The standard 65-inch P-series, for example, is now just $1,300, down from $2,000 last year. As for the M-series, it continues to be a solid value at $1,000 for the 65-inch set, though it's a bit less compelling now that the higher-quality P-series is dramatically cheaper. If you're looking for a bigger TV, the 75-inch P-series is now just $2,500, while the 70-inch M-series is $1,500.