Still no Broadwell
My fear is that this means Apple believes Skylake is delayed, since they'll presumably want to do another release early during that cycle.
For the iMac, yes, but apparently not for the Macbook Pros. See:
http://store.apple.com/us/buy-mac/macbook-pro?product=MJLT2L...
I am right now running half a dozen VMs (I'm doing some tests of network management software) and I can see a healthy margin of free memory before the machine will start to swap. I'm under Linux, but I have used similar workloads under Yosemite on a similarly configured Mac. If this laptop could go to 16 gigs (it was an emergency purchase after its 16 gig predecessor was stolen) I wouldn't even bother to check its memory.