New technology, new illnesses

Some people are spending too much time with their Blackberry, giving rise to sore thumbs. Now there's a therapy treatment for overused thumbs. Some intrepid hotel chain has also come up with a special hand balm after discovering that many of their business guests complained about hand and arm stress.
If I could draw a cartoon of the typical person in the 22nd century, I'd be tempted to sketch out two overdeveloped thumbs with other shrunken body parts. Darwin's evolution, no?