They may become more widespread, and start carrying genres found more often in PC/console markets, but take over? Not anytime soon. Consoles are like the Borg, they seem to adapt every time you think they're done for. Now, what they end up turning into, might be something of a hybrid. For now, PC and console distinctions will wane. In the future, who knows. They may be like laptops, portable enough for many purposes, but also able to hook up to full size interface devices and screens.
Or maybe nothing like that at all. Maybe they'll make toast while you play World of Whorecraft 3 Expansion 8. Ding.