Let the hive mind of Engadget get that for you.
"I am trying to configure out a really dumbed down and intuitive PC for my grandmother. She recently had a stroke and while she is under my care I would like to repurpose a laptop for her to surf and email her children. Anyone have any experience with what input devices and UI's are really understandable for the over 80 crowd?"
This was NOT an advantage, it made developing and deploying mobile applications as fun as driving nails through your hand.
Some sort of standardized form factor / feature set would do wonders for mobile development on Windows Mobile.