unable to log in to 'community' to post solution on the brainstorm page, but still able to get to talk/garage/etc.

anyway, i see two ways this can be accomplished and it may help to clarify what you mean by 'resizable'.

the simpler way
1. icons are created in sets and to 'resize' you can chose, at possibly an app or global level, which set to use, if available. If no icons are available for the requested size (sm, reg, lg, etc) then there should be a graceful implementation with the next closest or regular sized icons being implemented.

the harder way
2. in the desktop menu settings mode, the individual icons are able to be dynamically resized, similar to windows on desktop systems.

ideas?