Would that improve apps much?
If by "that" you mean 4K in my answer, you'd need to define "improve"?
Would apps run more efficiently? Probably, but not because of 4K; instead, it will probably take newer Ax processor to be the heart of a 4K
TV. It will probably be more powerful than the one in there now.
Would more apps be developed for the
TV? Maybe, though I doubt 4K would lend much push for such development. Instead, I would think Apple showing further commitment to the platform and maybe some kind of perception that a 4K
TV is going to sell more units than clinging to a 1080p-only
TV might spur on some app developers to create and release more apps.
Would graphics of apps be improved? Probably but that's also more pixels to move in apps like games and video-source apps.
Conceptually, the next
TV might fix some of the issues with the current one. For example, not everyone loves the remote as it is, so we might get a better remote.
On the other hand, video plays at the same pace whether the guts are improved ten or a hundred fold. Games will typically be timed to show some specific number of frames even if the hardware is capable rendering more. So app "improvements" might be nuance details you may or more not notice instead of something you really see or feel.
Again, it really comes back to defining "improve."
I share the same sentiment as post #7. If you want one, it's pretty cheap and resale tends to be great. If they are going to release a "5," it's probably next Fall at the earliest or, more likely still a few years out. If you buy one for about $150 and then sell it for about $100 when the next one is released, you paid $50 to "rent" one between now and then. If that's 10 months, that's only $5/month. If that 22 months, that's only $2.27/month. In exchange you get to enjoy all the benefits it offers instead of missing out while you wait for something that might not show up for 10 or 22 or more months.