I've played it on the Surface Pro 3 without any issues. Can't say how it would fare on a weaker machine. However, the touch controls work for the most part - with the exception of the right click being a bit of a pain.

I can think of the following potential uses for glory: 1. Purchase of auxiliary units for certain scenarios 2. Unlock of unique equipment 3. Elite reinforcements 4. Make available another (small) deployment location on another part of the map. Units deployed there might randomly take casualties to s...