From a Nikkei Business Daily interview, via our friends at Gamefront:
There's also some stuff about making it cheaper to develop games by making the "same APIs as the Gamecube" available to programmers. That sounds a little odd.A goal of ours with Revolution is to expand the target market for games. The current consoles are are constantly getting more complicated. The number of buttons on Joypads has been increasing steadily in recent years, for instance. Hardcore players can still manage, but for inexperienced people and beginners the degree of complexity is too big of a barrier.
In order to reach these people and to motivate them to play games, Revolution will have a "User Interface" that everyone can manage. However, Iwata cannot yet discuss exact details.