From WhatISNew comes 101 Reasons Not To Get A Tablet PC:

1. It's too expensive.
2. It's too small.
3. It's too big.
4. It's too heavy.
5. It's not durable enough.
6. I can't read it outside.
7. It can't get wet.
8. It's too slow.
9. It runs too hot.
...
101. If it were free, I'd get one.