The difference is the UI runs continuously and is RAM that a game cannot use. Th...

kllrnohj on Nov 15, 2013 | parent | context | favorite | on: PS4 UX is powered by WebGL

The difference is the UI runs continuously and is RAM that a game cannot use. The web browser, by contrast, does not. It stops running when you leave it. Or it could, anyway, if it wasn't also being used as a GL container for the UI.