Says Carmack, "it’s unquestionable that within a very short time, we’re going to have portable cell phones that are more powerful than the current-gen consoles."
Well duh - PSVita is pretty good indication we're heading that way, fast. But then, where does Carmack think we're going to find enough lithium to make mega batteries they'd need.
Unless Carmack is going round his devs' houses on evenings and weekends, he can't say what they're doing overall, can he?
Plus, if you spend all day developing a game, or play testing a game, I bet the lst thing you do is go home and play more.