I agree with Rol but furthermore, if publisher/developers are looking to escape the high cost/low profit dilemma of the PS4/720 they are unlikely to turn to the (not yet popular) WiiU. Instead they will and in fact already are turning to mobile. iOS/Android already have immense user bases, and you can make huge profits with small investments. In fact, in comparison WiiU is too expensive too produce for with far, far too small a userbase. Unless WiiU starts selling more like Wii, there really isn't any compelling reason to develop games for it, much like the problem Vita faces now.
All that aside, he might be right that development costs could strangle PS4/720 especially if they have slow adoption rates like PS3/360 had originally. I think MS has a strategy in place for this for console sales. Both might also be looking into making their brands PS/Xbox into cloud based gaming services playable on any platform in which case they side-step this issue entirely because no console purchase is needed (at least in areas where high speed internet is available). If they do in fact go this route, then it's Nintendo who is screwed as they are the only ones requiring a new high price console purchase to play their games.