2012 is shaping up to be the year of 4K.
4K Projectors for the home from more than one manufacturer - 4K TVs from 6 manufacturers that I am aware of. (5 confirmed - 6th is an exciting wild card rumor)
You can talk all you want about the slow and poor transition to HD - and you can sit there shooting 1080p content and claim that it will be many, many years before we are watching TV shows in 4K - but .... you'd be DEAD WRONG.
Things are VERY different now. TV is the internet. HBO GO has better compression in HD than some carriers. APPLE's VOD numbers for indie films are insane (in a good way). There's COMPETITION to deliver content - Google, Amazon, Apple, Hulu (with more than twice as much as the combined total of video streamed from the websites of ABC, CBS, the CW, Fox and NBC) - so .... delivery platforms will need to differentiate themselves with QUALITY. I'm aware of one early start-up company already working to be the first all 4K broadcast channel.
2012 the 4K dominos will fall.
1080 is the next Black and White. (and yes - you can still make a good movie in black and white ala "The Artist" - but harder when it comes to financing and selling the content)