"Nintendo, do something different! Wha - you want us to pay for it? Screw you guys!"
Trying something different is good, but I don't know why you are confusing being different with providing value. This is a cute idea. It looks neat. But if I'm spending $15 on a digital game, NES Remix is certainly not at the top of my list.
That said, how different is this really? Nintendo trying to cash in on nostalgia for old NES games (most of which aren't that much fun to replay now, and have already been pushed on Virtual Console multiple times) with expanded versions of WarioWare-style mini games? Doesn't sound quite as different or unique as you are selling.
I'm really not down on the game, but after sitting through a big portion of the YouTube video my thoughts are confirmed: the gameplay being offered is not worth $15 to me. In fact, after seeing more I'm not questioning whether it's even worth $10 to me - especially when there are so many great games with all new content available for less from sources like the eShop or Steam.
If you are excited about the game and think it's worth the money, more power to you though!