jamyskis: You'd like to think so - it seems the most obvious candidate for touchscreen gaming - but sadly that's not really the case.
The biggest problem with most P&C adventures is that most interfaces are designed with a two-button mouse in mind. Because you can basically only apply a single action to any given on-screen object, this means that interfaces need to be designed so that everything can be done essentially with a single mouse button.
Similarly, many P&C adventures rely on the player being able to mouseover objects to identify them at ease, which you can't do on a touchscreen. ScummVM found a way around this by basically treating the screen as a touchpad for the mouse cursor, but that was fraught with its own problems and really was only a workaround solution.
I tried playing Beneath a Steel Sky and Broken Sword 2: Remastered, and in both cases I ended up going back to the PC version out of sheer frustration.
That's sad to hear. Although I don't really understand what's going wrong there. I guess I have to try for myself.
Haven't the mouses for Apple computer also only one button? So if adventures run on a Macbook, they should also run on a tablet.
Finally, there are pens for tablets with buttons. For example one of my friends has a Surface Pro and with his pen he can write text, but when holding buttons on the pen he can also select or delete.
It should be possible but it might still need some time.
For example with just a touchpad and adventure games I could imagine that a single touch gives you options for a location which among others also include going there while a double touch or a swipe directly means go there and while a swipe on a selected item towards something means use it and the inventory comes up when swiping from a border of the display.
With the right design it should be possible.