What is the recommended approach for building line of business apps for Windows 8? e.g. complex bespoke finance application
They clearly don\'t fit into the Metro style
I think the same recommendations apply as they do now. If you want deep OS integration than you're probably better off with WPF rather than Silverlight. However, Silverlight 5 does a lot to plug the current holes in Silverlight 4 if you go for an out-of-browser application.
I think it really depends on the kind of deployment you're wanting.