I use a 3440 x 1440 100hz panel, G-Sync and all that Jazz. Similarly I also have a 4k TV with a HTPC hooked up to it. Both are great experiences depending on the game. For games like Assasins creed or Witcher 3, if I set and hold a stable 60FPS so it feels smooth, the games can and do look amazing on a large screen, more so with HDR on the TV that I will prefer sitting down in front of the TV then my monitor even with higher refresh rate + G-Sync. Recently put 100+ hours in on the TV with Assasins creed Odyssey and it was amazing.
On a smaller 4k screen however, that may change things however and its largely the TV's screen size that partially makes it attractive, the high PPI on a 27" panel however at 4k will likely not make as much of an impact for me personally and at that point imagine PPI on normal 34" 3440 x 1440 panel is good enough.
On a smaller 4k screen however, that may change things however and its largely the TV's screen size that partially makes it attractive, the high PPI on a 27" panel however at 4k will likely not make as much of an impact for me personally and at that point imagine PPI on normal 34" 3440 x 1440 panel is good enough.