Looks pretty good. For me the launch line up isn't so important, but arguably the biggest titles: Zelda, Splatoon and Mario are well spaced out. Speaking of which, I am a lot more interested in Zelda after that trailer. Price isn't too bad at under £300, however the accessories are too expensive, especially the pro controller. Having to pay for online is a pain in the ass, especially for Splatoon, however the improvements could mean it's worth it, especially if it's cheaper than PS+ and XBL. It seems they're doing a decent job of appealing to everyone. Stuff like 1 2 Switch and Arms should make for good party games for families, FIFA for casual gamers, and stuff like Mario and Zelda for "hardcore" gamers. Battery life isn't TOO bad. Remember the lowest lifetime is for the most demanding games, and a lot of the time you'll probably be able to make it to a charging point before it runs out.
I very much doubt I'll get it any time near launch, but I am interested.