Unity and Gtk would scale everthing up, so things that are properly drawn before being re-scaled. So quality will be there. For normal/low-DPI screens instead

Unity and Gtk would scale everthing up, so things that are properly drawn before being re-scaled. So quality will be there. For normal/low-DPI screens instead, you'd scale everything down, so you'd lose some memory CPU power, but you'd still get the quality result.