Displays that big can't actually view 1080p video well..Given that stats show about 60% of web users have a wide screen display greater than 1280 x 1396, streaming in 1080 P is obviously going to look better.
It doesn't matter what is good for that screens.... if you upload in 1080p the option to watch it in 720p will be available for those who want it. I see absolutely no reason not to upload in the highest resolution availableSo you think 720p would look better on them ?

I would say 720p is just fine.
yes go higher if you can but when it comes down to it if you have the choice of higher fps i would say choose that over 1080p
You should shoot at the highest resolution possible, given that the general quality/frame rate is not compromised. Many people just watch it at 360p or 720p, but that's why YouTube offers the option to choose resolution, to please everybody, the ones who think more quality is useless and the enthusiastic ones with 4K TV's.
Personally, I think that 1080p is becoming fully standard right now, but if you need less, for example 720p, to take slow motion shots, it's perfectly good.