Like I said, nothing "holds you back" if that's how you're happy to game and the that's what the vast majority of gamers are doing @ 1080p...
Oh and by the way as others have stated just because you're not rocking a 4K monitor and the 1K GPU it doesn't mean you're not an enthusiast or a gamer.
The vast majority of gamers either cannot afford, or don't understand the benefits, or have never tried 4K. It is a really sad state of affairs in the PC industry which lacks any meaningful innovation like the smartphone business achieved back 10 or more years ago going to Retina-class displays.
Of course, that gaming at 1080p holds these gamers back. Because they don't see the true image quality. In gaming, higher resolution is always better. And there is absolutely no reason to stop the progress at 1080p and like I have said - to stay forever married to it.
These gamers are not enthusiasts. Most of them are light, casual gamers, that sometimes buy heavily overpriced graphics cards and processors, and think that they have a lot.
Well, they don't and definitely are not enthusiasts.
The enthusiast segment doesn't include only 1K GPUs, but also 650-ish GPUs.
Enthusiasts are people who always stay with something state-of-the-art.
1080p is a resolution first used back in the 90s.