Why 30 or 60fps, but never 48, 50, etc... ?

[elazz]

Tv Panels have a refresh rate of 60hz or 120hz (higher end Tv's) so console games have always been locked at 30 or 60. Those games that run with a variable refresh rate might showcase some screen tearing. Although on my x930e that has a 120hz panel I haven't noticed any screen tearing for most games.

Also there is the output side of things where consoles beside Xbox one x can't output a refresh rate other than 60hz.