What I like about this reply is that I think the best answers are probably the ones you don't immediately think of, as they've changed things so immensely that they're now a component of cultural background noise.

FWIW, I remember my uncle in 2007 trying to game his contract with Verizon just so he could get AT&T and the iPhone. I thought he was being stupid for what I gathered was a useless toy. But now...