Also forgot to say: Santa Rosa also sports Intel Dynamic Acceleration IDA which probably is most intriguing technology of them all.
"Dynamic Acceleration takes the model a step further by balancing the allocation of resource even more carefully. When a Santa Rosa platform is executing a single threaded application it will actually switch off one of the CPU cores, thus eliminating wasted cycles. But the innovation doesn’t stop there, once the second core is idle, the clock speed on the active core will be increased to improve performance. Intel has also been very careful not to affect the TDP envelope, so increasing the frequency on the active core will produce the same amount of heat as if both cores were running at the standard clock."