This. This is the absolute killer app of the system. Sure, you'll have some Nintendo teams helping out with mobile games and whatnot, but with the Switch you're basically getting Nintendo's entire arsenal of handheld and console teams working on one system. Whether third-parties are on board or not, I'm confident Nintendo alone will be able to get the system through any potential software droughts.
This is the most excited I've ever been for a Nintendo system. I love good specs and I love the idea of being able to buy third-party games on a Nintendo system, however ever since it was revealed to be a hybrid I felt that would push a lot of them away. At the end of the day we're getting a classic Nintendo system that will play Nintendo games, and I'm cool with that. I didn't buy a Wii U because of the constant SW droughts, and I stopped playing my Wii in 2010, but the 3DS is a great example of a system that thrives with strong output from first-party software and I expect the Switch to expand upon that greatly.