I'm sure you are familiar with
Fantasy Grounds? Your product is priced competitively, which is nice.
Also you plan to provide a sensable upgrade path from Player Version to GM Version, very good. This isn't yet possible with Fantasy Grounds.
I'm interested to see how your photorealistic dice will compare to the dice in Fantasy Grounds. Granted this is such an important "feature" as it is a visual bonus, but theirs are going to be hard to top!
The feature list looks nice for a 1.0 product. I look forward to testing it out.