It's all about the workflow
After using SCOM 2012 for a little while, I appreciate its power, but the workflow is still extremely awkward and inflexible. If Microsoft have made it possible to do hypervisor and VM management with the same ease and simplicity of vSphere, then this might be interesting. Any other commentards care to weigh in?
Also, in before Eadon's bitching and moaning about the evil of Microsoft and how there's some OSS version that is faster, cheaper, and more stable, and which will simultaneously ease all your virtualization woes while massaging your prostate.