My trusty 50" plasma is on it's last legs, I've been hovering over the 4K land for a while, wondering, questioning, wishing... It's time 
I don't want to let my plasma go, it's just so pretty!!!! But, alas! 1080p has been fun and glorious. But it's time to move on.
So, price being no factor. I have some questions:
1) I don't want to go SLI with my 980 ti. Whilst I know it CAN handle the full 4k res, I know it won't be great. Can you scale down the res to a lower resolution on a 4K monitor/TV? Or is it 4K or go away sort of stuff?
2) PC monitors, same as above, at the moment, I'm on a 24" 1080p. Now, the way my home cinema setup is, I can't upgrade one or the other. It HAS to be both, hence the hold on to my 1080p plasma for so long. Are they any good at the moment? What's the general size of a 4K monitor?
3) Those that have made the jump, is it worth it? Or should I try and hold onto my loved plasma for another year or 2?

I don't want to let my plasma go, it's just so pretty!!!! But, alas! 1080p has been fun and glorious. But it's time to move on.
So, price being no factor. I have some questions:
1) I don't want to go SLI with my 980 ti. Whilst I know it CAN handle the full 4k res, I know it won't be great. Can you scale down the res to a lower resolution on a 4K monitor/TV? Or is it 4K or go away sort of stuff?
2) PC monitors, same as above, at the moment, I'm on a 24" 1080p. Now, the way my home cinema setup is, I can't upgrade one or the other. It HAS to be both, hence the hold on to my 1080p plasma for so long. Are they any good at the moment? What's the general size of a 4K monitor?
3) Those that have made the jump, is it worth it? Or should I try and hold onto my loved plasma for another year or 2?