I think it is good for the market to see the pendulum swing back-and-forth.  It was over AMD’s side for about 3 years, and now it is definetly on the Intel side and still on an upward swing.  VR-Zone has made a nice table for those of us who are more visually queued. 

AMD is planning on releasing a new 65nm die in Q3 of 2007, this will be a quad core die, while the Intel processor will be a using a 2 dual core die.  But the higher clock speed, faster bus, and larger cache on the Intel offering should still out perform the AMD CPU.

Original source.

Yorkfield Extreme Edition based on the 45nm Penry core architecture will meet heads-on with AMD Altair based on the 65nm K8L core in Q3 2007. Both are quad core offerings but AMD touted theirs to be a native quad-core with dedicated 512KB L2 cache for each core and an additional 2MB L3 cache for the 4 cores to share. Intel has different plans for Yorkfield. Instead of sharing L2 cache for all the cores, the L2 cache size is further increased. Due to its advanced 45nm process technology, Yorkfield XE is able to pack a total of 12MB L2 cache (2 x 6MB L2) and still achieving a much smaller die size. The clock speed is significantly higher at 3.46-3.74GHz too.

Yorkfield will feature Penryn New Instructions (PNI) or more officially known as SSE4 with 50 more new instructions. Yorkfield XE will pair up nicely with the Bearlake-X chipset supporting DDR3 1333, PCI Express 2.0 and ICH9x coming in the Q3 '07 timeframe as well. It is hard to predict which architecture will win eventually but it seems like AMD has packed more innovations into their K8L architecture while Intel moving onto 45nm process benefits its Yorkfield greatly in terms of lower power consumption, higher clock speed and a much bigger L2 cache. Certainly it is exciting ahead of us.