WinRT is client only.
I'm looking for a server-client solution.
I should be able to develop a WinRT application that is launchable from every browser! That would be awesome, and will beat flash and all the other crap.
Furthermore, say tomorrow HTML5 is dead, whatever technology replaces it, as long as it's not better than Silverlight, Silverlight-WinRT, or whatever you name that new technology (written in your preferred language including C++ and JS and thus probably even Python, C and others), will be rendered in the client's browser language seamlessly.
As per LightSwitch, I think this should indeed be related, but the problem of LightSwitch is that it's too limited. IMHO, LS should generate partial classes allowing the dev complete control of every generator method, feature, UI control etc.
It's a pity that MSFT has the best development languages and IDE, but doesn't take advantage and maximize its capabilities. Time will tell.

What do you say boys?