The saddest thing about people buying Nintendo consoles for Nintendo games is that they are basicly buying it for games and genres and series that havent developed anything since the N64. Mario, Zelda, Mario Kart. The big Nintendo games.
Other consoles are so much more dynamic, sure you still got your Tekken, but in 15 years its just another title. Whats hot and fresh keeps changing all the time. New fads come and go, new titles, ideas, mechanisms. The biggest change in games these past 6 years hasnt been waggle but the xp mechanism COD made big. Its everywhere now in every genre. Another shift is the online focus and coop.
Far from being the self proclaimed innovator Nintendo lags behind the industry.