Is this like smartphones? They get better and better but most of them are expensive for the lower class.

Only recently did they decide to have "budget" versions, do you think we'll ever see carbon fiber bikes going for under $500? At least in PC hardware you'll eventually get something that's twice as fast for $100 if you don't want to plunk down $400+ on upgrades.
I remember you could get a decent CPU and mobo for $200, now you're looking at spending $400 for a Quad core. (but this is probably AMDs fault for not being competitive)