One thing to consider is that the Windows app store will be Metro (not sure what to call it now) only. So Steam might be a pretty attractive option for filling

One thing to consider is that the Windows app store will be Metro (not sure what to call it now) only. So Steam might be a pretty attractive option for filling the niche of distributing traditional desktop applications. Being able to keep all my Windows desktop applications updated easily through Steam would be a lot better than having them all try and do it themselves.