I do like the idea of a standardised set of icons for user interfaces. Beyond a certain set of core elements, which isn’t very large – search, cancel, arrows, settings – icons tend to only really serve a purpose after they are learnt for whatever specific application. Having a quasi-official set might help in making UI iconography more universal. Then of course allow creativity on top of that. To some degree this is already the case, but having a body add some rigour to these de facto conventions would be nice.