I'm waiting to hear official numbers on the OS before I suggest any memory usage. The implication that the OS uses 3GB (1GB per each OS) is ridiculous, imho. I think the OS actually uses very little, but probably close to 2 GB is reserved for the display (GPU).
But yes, the HyperVisor OS is capable of allocating resources based on need between the two VMs. The system is even designed to throttle up or down cores and memory as needed. So if you're just watching a movie, the system can throttle down to next to no processing power, but if you receive a Skype call during that movie, it could throttle up the resources needed.







