Dryad - Distributed computing infrastructure from Microsoft Research

I wonder if the benefits of this product outweigh the cons of the costs of all the MS Windows 2008 licenses you need to get to run Dryad.

This would be cool if it actually offered something tangible that the existing distributed computing infrastructures lacked. It's like they've basically invented Hadoop.NET, so now it's something new and great. Congrats Microsoft, you are once again late to the party.