I'm warming up to the idea of the touch bar.
After learning about it yesterday, I've been watching myself use my current MacBook for work, and I've noticed two things that for me, might make the touchbar actually useful.
1. I often seem to open files just to look at them without making changes, only for them to throw up a save/don't save/cancel window. I never want to save, but there's no keyboard shortcut for don't save, so I have to take my hands off the keyboard and manually click the button. If those three options were on the touch bar, it would be much nicer.
2. I edit a lot of scientific documents with special characters, and I always have to either use the character viewer or copy/paste from another document to get the characters I want. If I could put those characters on the touchbar, life would be that little bit better.
It remains to be seen whether the uses I described will be possible or allowed by Apple, though. I wonder what the potential for third party hacks and customization of the touchbar will be.