This is the state of Moore's law and high tech in general. In fact, just follow the trajectory of CPUs, they are still competing! It's just right now, ASICs are giant leaps in progression. I remember when upgrading from a 386 to a 486 to a Pentium was a big deal. These days, going from one Intel chip to another, the improvements aren't that obvious and only in certain extreme conditions (games, heavy CPU intensive processes, etc).
In short time, I'm sure Bitcoin Asics will follow the same asymptote as time progress.
Its more of a sigmoid, but to Moore's credit it looks like an exponential when its most noticable.
Moore's law is over, just a couple more doubling's and its done. But progress continues. Other "laws" come in to play, though eventually it must come to a steady state.
But bitcoin is psycology, not physics, and that's a far bigger game.
I'm getting all polemic. shows its well past my bedtime.
