I wouldn't worry about this. First of all, I don't see them taking all developers to court. Second, I think Microsoft is going to be the party in this, not the developers. We don't have an option and as far as I understand the patent (I am not a lawyer though...)
if this patent is holding up in court Microsoft is more or less forcing us to use the store.
But... I don't see this holding up at all. I'll continue building my apps as I did before :-)
Dennis Vroegop
Destrato Microsoft MVP Surface Please mark an answer as "answered" if it does help you!