PCs are not slide rules
Graphic artists, serious programmers, spreadsheet fiends, and people who want fast, multiple hard disk storage are not anywhere near giving up their PCs. Also anyone who actually knows how to type/keyboard is not going to transition to thumbing and stressing wrists tendons in lieu of a legitimate keyboard. The only people I know who are using tablets are people who never knew how to use their PCs. It's a near-toy which, as you describe, is also useful for executives who never learned how to use their PCs either. That makes it a READING device for which it has some advantages over a PC (portability, primarily), but that's about it.
