Specifically, that means addressability and discoverability . One of the pieces that we've been working on is what enabling technologies can we put into our Windows products that will enable people to have the best or the widest connectivity possible and the most available discovery mechanisms. SSDP is a protocol that small devices can use to find each other locally. Many of these applications have multiple levels of discovery, and one of them is typically local-end discovery. Having mechanisms to do those things is very important.
Security is the second thing that peer to peer bangs on really hard.
In order to have autonomous computers that can participate in a group and then retract from the group safely, you're going to need security infrastructure that is based on local notions of trust. You can' t rely on the trust coming from the cloud. You can certainly join up with trust that comes from the cloud, just like I can. If you have a device and I have a device, I can have a policy in my device that lets me express that I trust you for the purpose of this conversation, and you can do likewise in your device. But if there were someone here who represented a big, huge tree, like a corporate directory, for example, we could also apply the same kinds of policies to that.