there are no games in 4K, no movies in 4k, no nothing in 4k. You'll be just wasting money on a TV to never even use its main feature and by the time there's 4k content there will be better and much more cheaper TVs to buy. At the end of the day 4k is a gimmick for a small 50" TV anyway. That's just another marketing point like with 3D and the 240-600-1000 HZ TVs with almost to no benefit at all.
Aren't multi-monitor set-ups basically 4k? I was under that impression since the math seems to work.
Irrelevant, because rarely would a game even look good under 4k. We're talking ultra high settings in Crysis 3 just for it to make sense at all and at that resolution and settings you'd need 4 titans ($1000x4). That doesn't sound very viable. There's just far too many variables, and no one is really looking into making a game that is natively 4k. Just think about it. I'm sure you've seen up-scaled games before, they don't look nice, hence the whole remastering thing we're beginning to see.
Fact of the matter is, it doesn't make sense to be an early adopter of anything really, it's a hardcore luxury thing with little to gain. Kinda like the Vita right now. Expensive and pointless, right now
How many games support 3D that actually are worth your time, probably none, or are you still playing Motorstorm? LOL
Again, movies are not 4K either.
Here's a list of current 4k movies. http://www.imdb.com/list/cTLrg_0aolM/
There are a few documentaries like TimeScapes, but overall, it's simply not worth it just yet.
Give it 5-6 years and maybe it'll be viable, for movies. As for games; I'd say 15 years maybe LOL