my guess, prolly not for awhile...
if anything id expect to see a x300aiw and x600aiw first before we see any x800-xt-pe-aiw.... and even then maybe not the x300 because of the new fab process ati might want to avoid taking the plunge with anything .11u until they know what they are doing
BUT im willing to bet when a X600AIW is released it will have the new theatre chip for vivo (r300 or something) because its been awhile since they updated the aiw chipset and it would make perfect sense to start the pci-e aiw with a new theatre chip