Yeah, when 150PPI is "low res" and 300PPI is "hi-res". It's a relative term anyway. Just like we called 720p "HD", but then we have "Full HD" (1080p), "QHD" (1440p) "UHD" (4k), at some point such naming methods became confusing, we just call them 5k, 8k... and 11k.
https://www.engadget.com/2015/07/10/...g-11k-display/
Now we have 100+PPI desktop monitors and 400+PPI phones. When phones can have 2000+PPI, it is reasonable to expect 500+PPI desktop monitors and 1000+PPI laptop screens, people will use VR and AR on DAWs, you can use a drinking straw as a wind controller and so on.