I really thought that I wanted the touch screen to use mostly as a replacement for a surface controller. While it does this exceptionally well. I find I'm loving it for scrolling and zooming in track view even more.
There is no control surface that I know of that can do this stuff.
That screen cost me $500 and you have to be on Windows 8.
Compared to a quality surface controller it's a great investment. Not to mention that you can use it for non Sonar apps also.
I just can't say enough about how much I'm enjoying it.