I found a good article that speculates on some possible enhancements that could be coming to vSphere this year and into next year. It will be interesting to see how closely these rumors track with reality as the year unfolds.
Highlights of the speculation include:
512GB RAM or more per VM
Enhance ESXi with Active Directory Authentication
Boot from SAN support in ESXi
Enhanced virtual graphics card to support high-def VDI
DRS for storage