The best thing about this new Mac is the lack of touch bar IMO. I can only hope this permeates into the MBPro models too...(even though I know it won't, since Apple will use it as a differentiating factor...but I really like the function keys!)
Touch Bar was not included because OLED screens, especially custom designed ones, no matter how small add to the cost. They also can't give the MBA a premium feature that the base 13" MBP doesn't have. I expect Apple to do something about the lack of Touch ID on the Escape edition very soon.
Touch Bar actually makes a lot of sense on a MBA since a lot of young people buy this machine and using emojis without the Touch Bar on macOS is a really terrible experience.
Touch Bar is here to stay on the MBP. I think it will eventually make its way to every single MacBook and possibly even the Magic Keyboards. Apple always holds some features back instead of giving people everything at once.