Cloud dev envs do not require millisecond latency. Typing is done locally. Latency only comes in at the times like when you go to open up a new file which isn't locally cached on your machine. Having to wait 200 ms for a file to open isn't so bad.
- VR headsets typically need very low frame times so that they can account for you moving your head and not give you motion sickness. The typical threshold is ~10ms, but it can be improved with good reprojection tech
- Older LCD TVs often added >50ms of input lag, although this is much less of a problem now, but this was enough for lots of people in the 360/PS3 era of consoles