Apple's already completely trashed their line of computers, the last thing they need to do is to gimp all of them with a lousy mobile processor.
OS X has been a snoozefest since Snow Leopard with its ridiculous iPadification. Mac Pros haven't received a legitimate upgrade in YEARS for professionals. iMacs got gimped by being limited to one hard drive, no user replaceable ram and no optical drive in a DESKTOP that many professionals still use (iMacs get used frequently in design studios). And the Macbooks... at least they kept the normal line of MacBook Pros with a combo drive, I got mine loaded with two drives (one for OS and the other 1TB for storage and files). They gimp that too and I'll make that the last macbook I buy. The Mac Pro doesn't look like a reasonable purchase either.
Congratulations Apple, you've officially set yourself up for fail.