Stephen Hackett culled together some takes on the first iPod when it came out in 2001.
In particular, Eliot Van Buskirk's thoughts caught my eye. They're remarkably prescient:
I know that Mac-only compatibility is just one of the things that people will complain about in reference to this device. But the naysayers have it wrong, and I’ll tell you why: The iPod is revolutionary in a number of ways, and its descendants will replace the PC.