Absolutely. It's a bit like buying a car. It's depressing to think perhaps that you could have waited for next year's model, but consider you'd have been walking for a whole extra year...

Obsolescence is, however, in the mind of the beholder. My Newton still works (I use it most often as an occasional fax machine). My N810, which seems to have been written off, performs sterling service in many ways. The N900 I have in hand will perform likewise until it dissolves. It does what it does now. Waiting would have meant I walked a lot further this year...