But but you can buy a 4k TV. It is so "mainstream". Not that <$500 GPUs aren't struggling already at 1080p XD thanks game developers... some games look nice and run 80fps 1440p, other look as nice but run 300+fps...
The whole industry has to come together before we see good 1440p let alone 4k performance in 3D applications and games, from panel makers, monitor makers, GPU makers but also application/game developers.
You can get OK 4k monitors I think but it's all 60Hz
And then come the retail horror stories
Sadly almost no monitor maker provides review samples in a way of a refund after reviewer buys it from retail. Some PSU makers do this but that is a much more competitive market.
Why not set your console to 1440p? Or 1080p? It's not like consoles can drive 4k GPU wise anyway. It depends on the input board/scaler if it accepts larger inputs and will downscale. With Samsungs you can do that I suppose but they are also notorious of adding input lag for 60Hz use over HDMI when scaling.