According to the site Nikkei, Nintendo is putting mini-games that will act as demos for Wii U and 3DS games. http://news.cnet.com/8301-1023_3-57...xperiment-with-mobile-mini-games-report-says/ One of Nintendo's biggest problems has been their advertising, so this could work.
Full mobile videogame ports have been around for years. And then there's the emulators, which already allow you to download full Nintendo games online, as well as many other games. I'm not so sure Nintendo is gonna win many people over by using an old trick like that, using only demos instead of full games. On the off-chance that it does become a success, i'll applaud them. This all seems like a desperate move for Nintendo to advertise their games, and i doubt it's gonna have the effect they're hoping for.