I will note that the "no shared memory" requirement is a bit confusing.
I have successfully run MA2onPC on the HP TX2 which is advertised as having ATI 3200 graphics with 64mb of dedicated memory with additional shared graphics memory via system RAM.
Obviously this violates the strict requirements wording - I can attest, however, it does work very well. Perhaps stating that there is a requirement for a certain amount of dedicated memory might be more accurate?
This one was returned to the store as its build quality was rather flimsy but I am eagerly awaiting the next generation of touchscreen laptops with Ntrig's technology - the interaction with MA2onPC was already very slick (including encoders and faders). Apparently they are working with Fujitsu to allow detection of all 10 fingers simultaneously.