Clustered VAAI?

In reading the recent updated VMware vSphere Storage API Array Integration (VAAI) White Paper, I noticed a statement that caught my eye.

"VMware does not support VAAI primitives on VMFS with multiple LUNs/extents if they all are on different arrays.."

I understand the difficulty in doing this, but it makes me wonder if the coming VMware vVOLs will be the technology that gives the vAdmin the capability of crossing array bounderies on a single LUN that supports VAAI primitives. 

If anybody has thoughts or insight to this, please tweet or comment.