I think, they will need to drop vTAX and change it to HW limitations, eventially. All our new VM hosts has 96+ GB of memory, and as a result we even do not consider VMware ESXi 5 as acceptable optioon, but will stay on 4.1 and then migrate on what we will have instead - if vmWare will have vTAX yet, we will not go with it (except if limits wil be something like 128 GB per 1 cpu for standard).
Well...no surprises that "VMware did not respond to a request for comment on its decision to discontinue vRAM."
The VMWare champions (Duncan et al.) must be sick to the stomach to have been exposed as puppets and mouthpieces in the vm wars between EMC and M$.