A quick heads up for those of you in the Nest nation. Along with all the new hardware announced today comes an entirely new app, and not just an update to the existing one. When you update your existing Nest app, you'll find that the icon goes gray, the app renames itself to Nest 4.5, and you'll be prompted to download the new Nest 5.0. (Which you can get here.) You'll have to log in all over again, but after that you're up and running with the new hotness.
It's a little bit of a pain, sure. But not a huge deal in the scheme of things.