It depends on what you are trying to do with your $100 investment. If you're looking to replace a $650 to $1200 laptop with a $100 tablet, then yes, it's a waste of money. If, however, you are a bleeding-edge technology advocate, then your $100 is an investment in moving the horizon of the bleeding edge.

As a practical matter, I don't care how droolworthy a piece of hardware is (eg, iPod, iPad, Android smartphone, etc.), on general principle I never buy any new device in its first generation. I always wait for at least revision 1 (version 2) -- which in hardware generally means attention has been refocused on design/problems rather than adding new bells and whistles.