This does not seem like a major announcement to me. They added a bar and touch ID. But they added force touch with taptic engine last year and it took 3 minutes to introduce.
Between this and Surface with Bash built in, it's the first time since Windows 98 that I can see myself using a Windows computer.
This machine is not pro, as in not for professionals. No self-respecting Musician, Artist, Writer, Programmer, Photographer, Sportsman, etc. can make their living on this. This is what you take to a coffee shop to check e-mail. Anything else requires a dongle. It doesn't "just work" if you need to plug in a series of cables first. That's how Windows laptops were handled. They needed drivers for anything meaningful, this needs dongles.
I need a laptop to create. I don't need a laptop that competes with a notepad on thickness and usefulness. It was all Steve Jobs. All of it.
When is 4mm thicker laptop less elegant than thinner laptop with 5 dongles? Only on paper.