“You’re always fighting things that are opposed to each other…So as an example, let’s take the PlayStation Portable, alright? Great game machine, but it’s not such a great music player, and there’s many reasons for that, but the main reason is that it doesn’t fit in your pocket, right?
So your games want nice big screens, music players want to fit in your pocket. You have to pick one, and optimize for it, and the second thing you do will certainly be suboptimal. Maybe you can do it, but it’s suboptimal.” – Steve Jobs at D3, 2005 (~2M:37S)
Updated: Yes, I had misheard, and misquoted that. Apologies. Steve didn’t predict the future. He said “PlayStation Portable”, not “PlayStation 4”.