Did not know that, and indeed the pentium m / core / core 2 series microarches have done incredibly well.
I've become something of CPU collector in recent years, and I have a nice line of p6 cpus from thePentium Pro -> Pentium 2 -> Pentium 3 -> Pentium M -> Core 2 that conveniently sidesteps those awful Netburst p4 CPUs.
It feels like this (p6+) microarch has finally run out of road and needs a rethink. What 'saved' intel was a change in philosophy rather than chasing MHz they chased power savings. And with Apple's new chips that history is repeating itself (and appears to be with a similar outcome).
It's an exciting time for hardware again because Intel and AMD are going to have to react to this and I think there's still legs to x86, it's survived everything thats been thrown at it so far...