I'm not against the touchbar entirely, but it's is not going to improve most of the things they're showing. It's not going to be faster to take your hands off the keyboard, and reach up to hit a word suggestion, than to finish typing that word.
New Trackpad looks good.
The application specific features are a great idea, but ... I'm not sure how widely used they will be outside of Apple's specific apps. It's kind of like Siri built into the Mac. Having had Siri on both my Mac's since Mac OS update, I've never intentionally used it.