I'm running Windows 2012 on my laptop (not R2, should I? why?).
Please don't ask why, I like to do so for a number of reasons.
Now, there is this new 2012 feature to do deduplication: http://technet.microsoft.com/en-us/library/hh831434.aspx
I wonder if it's worth to run it on a laptop since it's not on all the time (and if I understand well, it needs to run deduplication at time when machine is not/less used).
On the other hand, I have 1 TB of internal disk (os is on SSD) which is filled up with virtual machines (vmware workstation, no hyper-v yet -working on that-).
These fill up almost 500 GB and it would be nice to have some more space ....