The $35/mo is a very aggressive price for VDI in general. Their TCO calculations for on-premises VDI[1] isn't too far off the mark. Microsoft still needs to be paid and SPLA licenses presumably account for a good share of what you're seeing here.
Amazon doesn't have a history of entering the market at a high price point. It might be high for your use case, but your use case isn't what they're after. VDI is a desktop replacement where you run all your applications, not just one or two on an as-needed basis.
Amazon doesn't have a history of entering the market at a high price point. It might be high for your use case, but your use case isn't what they're after. VDI is a desktop replacement where you run all your applications, not just one or two on an as-needed basis.
[1] http://i.imgur.com/njlJklF.png