You guys have brought this up a lot in the last couple of pages, so I wanted to address some issues.
1. Nintendo has said that they are not using the Switch to replace the 3DS, and it is likely that DS development continues because it holds a huge market and producing games on that system are fairly cheap by comparison.
2. While the Zelda game for the Switch will certainly help with initial sales, first party nintendo support is not going to keep this system above water. The Switch is ABSOLUTELY going to sink or swim based on 3rd party support. Nintendo has come out and given us a huge list of developers on board, but not a single developer has confirmed shit for the Switch. Which is a huge fucking problem. When Microsoft and Sony announce a new system, they always show off a ton of games for that system, and almost none of those games are first party developed. Nintendo comes out and shows us 99% 1st party game on this thing, and the 1% that isn't 1st party is fucking faked. If that isn't firing warning bells off in your heads, ya'll must be blind.
3. The mobility of the console is more to attract the Japanese market, as the mobile gaming market there is huge. In the west we don't use mobile devices beyond our phones that much, because we frankly don't have the time while out and about to play something the way Japan does. Japan is a culture that thrives on public transport, which means they play on their commutes to and from work and school, whereas western folks mostly commute themselves and you shouldn't play while driving. Now people in the west certainly do use mobile devices for gaming, it is nothing compared to the Japanese market.
4. Finally, the Vita. Look guys, the Vita is the Wii U of handhelds. No 3rd party support, means it sold like shit. Which is a shame because as a system itself, it is pretty fucking good. Great graphics, excellent features. I use mine a lot as a companion piece to my PS4. The fact the the Switch is both the console and the handheld might help it in that regard.
Ultimately it comes down to 3rd party support. We've seen absolutely nothing in regards to 3rd party games on this thing. Zelda might be great, but what you are looking at is yet another Nintendo console with only Nintendo games on it. Underpowered hardware, I can almost guarantee, will cause any 3rd party game to simply be an inferior experience on the Switch compared to the same game on any other system.
Ask yourself this....If you could play your favorite game on the go with the ease that the Switch advertises, will you sacrifice frame rate, fidelity, playability, on a handheld with around 2 hours of battery life? Will it really be worth it?