A bit of good news from the new licensing model with vSphere 5 is that for VDI vRAM entitlement is unlimited. This is really good as in my opinion VMware was facing good competition with Xen in this area. Not having the vRAM limits on the VDI is really a positive move and I think will be welcomed by many who have been displeased by the new vSphere 5 licensing model.
Keep in mind if you are not happy with the new licensing model, it’s an easier fix for VMware. It’s not like the hypervisor has technical flaws/lack of capabailities like it’s competitors.