Hi Myles,
The waterless window system is very interesting. It's a liquid that you apply to windows and glass surfaces with a special microfibre cloth (provided). Let it dry and then vacuum off with a specially designed nozzle.
It works in a similar way to carpet cleaning powders - as it dries, it absorbs dirt and grease and once dry, it can be vacuumed up like dust.
I'll get some more pics over the weeekend for you 
Chris
