You are right, Hypertransport was introduced with the K8 architecture along with the AMD64 ISA.
Since then both Intel and AMD have been playing catch-up with virtualization support, with multicore CPUs, SIMD extensions, etc.
I think the most important asset of a chip manufacturer is their process technology and the ability to shrink the die faster than the competition. Intel has been ahead of AMD all the time. This advantage allowed them to take the detours of Pentium 4 and Itanium without losing too much ground to AMD.
The question is: what would be the mind-blowing awesome tech? My impression is that the innovations take place in the space of low power chips and GPUs. For the CPU the future seems to be even smaller structure sizes, larger caches, more cores and for some markets procesors with CPU and GPU cores on the same die.