The Touch Bar has revolutionized the way I accidentally invoke Siri once per 30 minute period.
Honestly, these sorts of anti-patterns are what makes me think Apple has seriously lost the plot.
I think you can disable the touch pad on most laptops and just use an external if you're just getting spurious inputs from your wrists. The Thinkpad Trackpoint is still one of the best mobile pointing devices available.
I wish I could make it open links in a new tab (like middle click on a mouse) instead of that annoying preview thing.
3d touchpad takes a 2d device and adds a pressure channel, making it measure three dimensions x,y,z. So yes, 3d like a Kinect.