I use a ThinkPad T470 at work and it's served me quite well. Not really sure I'd want to go much smaller. I do agree that it's silly to have Print Screen where it is (though it's actually kinda handy, too, when I need to take a whole bunch of screenshots, e.g. when writing documentation).

The idea of being able to plug a laptop into a server or something and instantly transform said laptop into a console is pretty neat. Sure, that's what SSH and RDP are for, until the server falls off the network. This would be a great application for USB Type-C; just plug into the C connector on the front of the server, switch to "console" mode on the laptop, and you're in business.