Astropad looks similar to Duet Display, which is what I use. If I recall correctly, it was only $10. Super handy for hotel room editing and logging. Only problem is that it doesn't work as well with Premiere as it does FCPX. Perhaps Astropad is better.
As for CTRL+, While I agree that a pro should have keyboard shortcuts down, many people that are new to editing don't. I'm happy to see that companies are easing the point of entry. I prefer the tactile feedback of a real console, but day-to-day, I see no problem with just a keyboard.