vSphere 5 - what are the benefits of the new E1000e NIC?

Hi,

There's a new virtual NIC type in vSphere 5 - E1000e . The details are rather scarce and the KB article "choosing a network adapter for your virtual machine"  (http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1001805) does not mention it.

What are the use cases for this NIC type? What are the advantages over E1000?

Thanks,

P.