Yes and no. When Nokia (or any other device manufacturer for that matter) releases a brand new product, they dont go out of their way to convince you that the one you currently own is way past its use by date.

iPhone -> 3G = faster 3g networking
iPhone 3G -> 3GS = twice as fast
iPhone 3GS -> 4 = Biggest leap forward / screen 4 times clearer

They always compare their new model to their old one. You can argue that they need to show people whats new and good about the new product, but that sort of marketing is designed to make the older product obsolete.

http://en.wikipedia.org/wiki/Planned_obsolescence