This is giving you control of the allocation on one specific VM host. So you have, for example, a box that is hosting x m4.larges that you can fill how you want

This is giving you control of the allocation on one specific VM host. So you have, for example, a box that is hosting x m4.larges that you can fill how you want. Plus you have information about the hardware, so software that's licensed per physical machine can be run on each of those instances.