I also was looking for that but I can't find it only trough benchmarking I guess ! Proberly Microsoft will anounce something about it soon I hope
@ J-Lawrence That is showing it is available but disabled. The greyed out ones are not available on the chip at all. Green is available and active or not disabled. For example if you go into your bios and disabled hypethreading then the HTT will show as red, available but disabled.
if it's a desktop set it power savings maximum performance and stand by after 1 hour, the best thing on ANY desktop cpu, notebooks and those are different story
It is a bit more then that, in nutshell the hardware takes over cpu power management and reacts much quicker to needs then when the OS. Up to 60 milliseconds faster this translates to lower latency, but will depend on what you are using your pc for, in how much advantage you will get. Yes mobile and "tablets", and touchscreen systems will get the most benefits.