I think the switch wasn't made to replace the Wii U or 3DS. But I guarantee it will both. The only problem I foresee is that it doesnt have any real optical drive so people will get mad about it not playing music and movies. I bet the Switch will come out in 16gb, 32gb and 64gb sizes. And it will not have a hard drive it will be MicroSD. For the first 9 months there will be no way to upgrade to 128gb or further. We have read that Gamecube games are going to be on the Switch VC so I hope they allow you to download your digital WiiU non VC purchases on there. (ie WW HD, TP HD) I bet when the Switch comes out if you get one early enough they will allow you to have a third nnid tied account 3DS Wii U Switch If you get a switch after say 8 months one of the older two will only allow you to transfer account and you will lose the license rights to games on that device.