Comment Android, not Apple. (Score 1) 315
I can't believe no one has mentioned Android. It's the highest selling os today. Its driving phones, tablets, settops, consoles and laptops already. With the arm architecture slowly getting more powerful (64bit quad-core) and things like nvidia licencing its gpu it's not long till we'll see it on desktops. The android play store allows you to purchase a game and play it on all your devices with (in theory) quality scaled to the device's capabilities. Apple will be to Android what it was to Windows; a distant second.