Meh, not too exciting. I would have been wetting my pants if they instead announced some kind of full GFW Live partnership and integration with Steam/Valve. I have no problem leaving Steam running, and using its overlay is kinda sweet. I do NOT want 2-3 such things running however. =(
What this really sounds like to me is another step by Microsoft to get some control over the PC market like with the 360 and make the two a package deal. All they need is digital distribution to come to the 360 and/or be fully supported on the next Xbox and suddenly they can offer a rather complete development and distribution system to devs and publishers to hit two of the three platforms. Then it becomes "why bother doubling your effort just to sell a few extra copies on that sony system?"