vmforce

Well, the news of the day for me (except the sinking Greece;-) ) is vmforce.  Two  innovative companies – Salesforce and VMWare – join forces to build an enterprise java cloud:

Salesforce.com and VMware introduce VMforce—the first enterprise cloud for Java developers . With VMforce, Java developers can build apps that are instantly social and available on mobile devices in real time. And it’s all in the cloud, so there’s no hardware to manage and no software stack to install, patch, tune, or upgrade. Building Java apps on VMforce is easy!

I had not time yet to look deep into details. So I will ask. Can someone explain me what is the major differentiator against Google App Engine and against the current SpringSource offering (SpringSource = part of VMWare) offering called Cloud Foundry?

Looking forward to read your opinion!