I'm guessing it probably will be, because people love the Wii/Nintendo/etc., but I can't help but be a bit repulsed by it. It looks like that the 1980's thought the "future" looked liked! I want to protest on grounds of bad design alone.
Right now, Nintendo is saying that the console and the controller will not be sold separately. Some of the gadget and games sites are making a big deal about the bundling.
If it was for replacement, I think Nintendo would almost have to let you buy it separately. But I don't know. This doesn't sound like a very good marketing move for them. People don't always keep their receipts if they were required to show proof of purchase for an individual replacement.