By touching the screen, you can trigger shortcuts, macros, or otherwise control the connected Mac, all from a bar designed to sit above your keyboard, like the original Touch Bar.
Flexbar review: Could be the heir-apparent to the Touch Bar, someday Flexbar review: Designed to be near the keyboard and your fingers.
The Flexbar is a replacement for Apple's Touch Bar that could give the Stream Deck a run for its money — assuming the software is fully hammered into shape at some point.
The Stream Deck is an obvious and well-tested option, but if you wanted an interface that's much closer to the Touch Bar in concept, you should instead turn to the Flexbar.
Consumers no longer have the option of using the Touch Bar in Apple's current crop of hardware, and instead they must look elsewhere if the want something similar.