I'm not exactly sold on the Switch as it stands. $300 is, well, kinda steep, considering what the rumors are saying about its power. I can't imagine that it reaches XBOne or PS4 levels, and the battery life in off-screen mode leaves something to be desired. Premium online services are also something kinda souring me on the Switch, as their track record for online is spotty at best.
One real win they did make, though, is their region-free stance. It feels like they'd been dragged kicking and screaming towards it, but it's removed one of the major impulses for console modification. Now, if they decide to provide a homebrew sandbox, they'll make their system much less-tempting a target for the majority of hackers. I mean, pirates are still going to try, as are those seeking the challenge, but pirates are gonna pirate, and tinkerers are a small portion of the userbase that can reasonably safely be ignored.
As far as games?
Breath of the Wild is really the only interesting title for me, and that's getting a Wii U port.
Super Mario Adventure 2 Battle Odyssey is a way off, as is Splatoon 2, even though I don't have much interest in it.
Smash info was non-existent, which is kinda disconcerting. This means that either a Switch port of Wii U is either down the road further, or it will be a 5th entry into the series. A 5th entry means probably a wait of a couple years, so a Wii U port with added unused assets (Ice Climbers), simpler characters to add (Wolf), and then a renewed DLC cycle could've been a decent cash-in title for a smaller team while a true 5th entry was in development by the bulk of the Smash devs.
Like it or not, Smash is a system-seller, and so with some people, no Smash early means initial sales figures will suffer, likely causing a Wii U-style situation. 3DS also suffered from a poor launch lineup, but Nintendo could afford that, because they own the handheld market. They can't really afford it in the console arena, which, let's face it, the Switch is.
I know, Nintendo has endless trunks of money and can afford to eat losses, but in the end, they're a business, and at some point, they're going to decide the gaming market's no longer for them if they keep having console flops. It happened to Sega, and we're arguably poorer for it today (Sega had almost always been ahead of their time with hardware, especially in the arcade arena. And while they flopped as much as they succeeded, we aren't seeing too many real innovations outside of Nintendo anymore).