While touch friendly interfaces are rising it should not be used as a catch all. If any interface is designed to be used for the finger, than more than increasing space around icons should be done.
In that case, an specific theme should be used for finger-oriented interfaces that boost the spaces and inputs.
Also, the rest of the users should not be handicapped for something that they will never take advantage off.
I would like to see a screenshot of W7 with a few windows open in a small screen device such as an EeePC....