The Offline Virtual Desktop Infrastructure previews how a single virtual desktop infrastructure platform may be able to support all enterprise PCs in the future. Let end users "check out" personalized virtual desktops running on VMware virtual desktop infrastructure to a notebook computer for use offline and then "check back in" to the same desktop running in their virtual desktop infrastructure environment.

Cool stuff. They is definitely much demand from the market for offline usage of (VDI) virtual machines, especially for Laptop users. This is also often referred to the checking-in and checking-out of virtual desktops. I have not seen this technology but I think that this will rely on VMware ACE technology. 

Press release.