The one thing that's been lost since 8.5 is the ability to access every function of every PRV tool without switching tools. SmartTool comes close, but still doesn't do everything. For the functions it doesn't include, tool switching is required, and sometimes that means switching modes within a tool. Every time the user has to keep track of the mode of the program, that's a design smell, and it still hasn't been remedied.
For everything else, using the toolbar/control bar for routine elements of workflow is inefficient in the first place.
Touch will not take off beyond the matrix view for several reasons:
1. Touching a vertical surface is not ergonomic.
2. A DAW presents a high concentration of information requiring either a precise pointing device (which a finger isn't) or a large amount of real estate. The problem with consuming a large amount of real estate is having to shift visual focus from one point to another (which is why Sonar's side-docked Pro Channel will never be as natural to use as it would be if it could pop up wherever the cursor is).
3. Touch may be a great way to control faders in the console view, but, unlike conventional faders and knobs, touch faders cannot be manipulated without looking at them. Besides, the console view itself is a vestige of 20th century hardware-centric design philosophy. It is far more straightforward and efficient to mix and produce in a single view, and based on all kinds of videos being made today (including Pensado's Place), DAW consoles seem to be going out of style.