Vizio did not announce its new line-up at CES 2015, and we are still awaiting details. In the meantime, specifications and pricing details for the new Ultra HD M series have leaked to HDGuru.
Vizio’s 2015 M series
The new M series will come in 42 to 80 inch sizes, all with 4K Ultra HD resolution. The M series is a mid-range model, but is still using full-array LED with 32 zones of local dimming (in the 65-inch model).

There are TV apps built-in, including Netflix, Amazon, YouTube, Vudu, Hulu Plus, Pandora and iHeart Radio. 3D is omitted, as Vizio has decided to exclude it from all TVs.
The first Vizio M series TVs will become available in spring, but you will have to wait for summer/fall for the largest sizes. Prices will reportedly start at $599 and the largest 80” will cost $3,999. A 50-inch will be available for $899.
Expect more details soon when Vizio officially announces its new line-up.

- Source: HDGuru