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I just bought a 4K LG 49" TV and couldn't be happier! Used a 37" Vizio 1080P for years before that.
Cool, I was just going post question, you just answered, Ive just been looking at upgrading to 4K, (and size).
To OP, also I had been using a 32" Samsung TV for years now. works fine. But as said its all relative (everything's just bigger), cant dynamically scale skylight windows, which would also be nice for FX plugins (like FabFilter's), But you can effectively do want you want using 2 or more monitors (as your graphics card allows), i.e., it allows you to see more things separately at a time. (like I usually have my audio interface software mixer displayed on one), but you could put console, piano roll, open FX plugins, etc. on different monitors.
Cheers