Michel Roth, who works for the desktop virtualization division of Quest and runs the Thincomputing.net blog wrote an article titled: “A closer look at the new “Dynamic Memory” feature of Hyper-V: is it worth it for VDI? “. The article details what Dynamic Memory is and especially on what it can do for Virtual Desktop Infrastructures (VDI). Michel earlier wrote an article about the upcoming RemoteFX functionality which will also be released with SP1.

Dynamic Memory provides the ability to pool available memory on a physical host and dynamically make that memory available to virtual machines running on the host, based on current workload needs in the virtual machines. Dynamic Memory allows you to specify a starting value and a maximum value for virtual machine memory allocation, basically by automating hot adding and removal of memory to a guest VM.

--> The rest is on the blog :

http://virtualization.info/en/news/2011/02/tech-dynamic-memory-for-hyper-v-is-it-worth-it-for-vdi.html