Bottom line - as rgraves put it, what we have here is something approaching a holy grail - it only does everything. Nintendo games in HD and third party games to appeal to the hardcore. It's biggest and best feature is the tablet though.
If it flies off the shelves they will only need a year to secure their place.
You and rGraves are really dreaming. Of all the casuals I know who've bought a Wii, none are still using it now - it was a gimmick, funny for some occasional Wii-parties @ somebody's house about a year after it came out. That tradition died off soon enough as all - ALL- participants agreed that the supposed motioncontrol was vastly overpromised. So don't expect many people to rush out and buy this new Ninty-toy on release or a year later. The core most likely will, just as the core will buy PS/Xbox the year after that. Nintendo's machines in the past haven''t exactly gotten a reputation as THE (streaming) media-machine either... so holy grail - for your taste of gaming maybe - but not in the slightest as the one-convergence-box-to-rule-them-all-for-the-masses.
The nextgen will be a lot more resembling a three-horse-race this time round.