This is one of the features I found really interesting. New, tech-stuffish and definitely interesting. While you won't enable it on raw compiling, video rendering or excessive gaming, you might throttle it down nicely for HTPCs, surf stations and so on. You could even buy them in 10 packs with a rebate and then put them in different boxes for different purposes. Just configure one to be your little HTPC with ASIC aided video decoding and one as you big boom machine for Gentoo compiling or similar things.
The mainboard looks also interesting though I'd rather go with the A88X-Plus cause it has 3 classic legacy old school PCI slots (for my bazillion of PCI cards I still have and use), as well as lots of SATA and USB headers.