I have a 32" 4K monitor in an upstairs room where I work from home with my work laptop. It's away from my main compute infrastructure but I did want a personal

I have a 32" 4K monitor in an upstairs room where I work from home with my work laptop. It's away from my main compute infrastructure but I did want a personal device, and a Raspi can drive 4K. So I bought a 4GB Raspi4 and overclocked it to 2GHz. As long as you can live with slightly sluggish mouse click response, it's OK. Make that very sluggish on heavy Javascript web stuff like Gmail or Facebook. But it all works. Video playback is an issue. First I ran the default 32-bit Raspi OS, and 1080 was marginal (forget 4K - it does drive the resolution but it's not fast enough to really do video - fullscreen Youtube for example at that resolution). So I applied various copypasta from the internet to fully enable hardware accelerated video - the framerate of glxgears confirmed that GL was faster than before. Video was now performant but with horizontal tearing issues that weren't there previously. After the official 64 bit Raspi OS came out, I started over with that. Performance is not noticeably different. Not all the copypasta from before worked; no tearing issues now, but again if you want to play local media with VLC or mplayer, better stick to 1080 and if you want to comfortably watch fullscreen Youtube, go to 720. I have some quick command line aliases to switch the display resolution for this. The device doesn't do suspend/resume, but on the other hand, desktop idle uses about as much power as a night light, so it's simply left on all the time. It's in the open (screwed to the bottom of a desktop) with a pair of small heat sinks stuck to the main integrated circuits. Thermal is OK; about the only way to drive it to thermal throttling is the "stress" command; otherwise heat is not a limiting factor. One thing that was mostly impossible last time I tried it with Raspi OS (32-bit mode) was video calling with the common web-based tools. Skype, for example, didn't offer it, no matter what the system configuration. This may be a deal breaker for "main computer". Others have said that the Wifi on Raspis is solid, but in my own experience they always end up plugged into a hardwired ethernet connection.