Something to keep in mind with this sort of thing is Tablets. On a tablet its not really part of the idea to hit a pair of KEYS to run something. Its a single tap of a finger.
I already currently use HL on my iPad using Splashtop and why its not impossible to hit a pair of keys through the app its not really natural or super easy to do that.
As they are moving forward eventually with Tablet builds of HL I would think they would want functionality that would work for both. So maybe something along the line of Macro buttons that are easy to toggle on/off then I personally would be more interested. But key-bindings to a keyboard only are so 1953...
