It's on my "smart TV" and there's a 50/50 chance that when I turn on the TV it crashes. On the plus side it's helping me stop watching so much TV.
Computer screens are meant for sitting very close, and TV's are meant for sitting back aways... so the viewing experience will be "off" a bit (due to pixel densities) if you use either for the other purpose.
Also, most computer screens don't have COAX inputs, usually only have 1 HDMI input, etc...