If you add R500 odd for a Logitech PS3 keyboard, you can web browse, mail and IM from your PS3 pretty comfortably. It will play any video or audio you can contrive to throw at it as well.
It however won't burn you CD's or run office productivty software.
Unless you get a older PS3 Fat and install Linux on it. Then it can do at least half of that too. :P






