I think 8x improvement is too shabby when it means sacrificing the ability to gpu mine also. whos gonna really benefit? those with decent cpus and decent gpus in the same rig. most gpu miners have shitty single core processors which in this instance will be turned into 8 threads but again to do this they lose the ability to gpu mine other coins.
That's a constant though - no matter what coin you ARE mining, you're NOT mining all the others. If you think of mining as lost opportunity on every coin that you're not mining, then you, my friend, are a pessimist of considerable capacity!