I agree some format to attach more metadata into schematics is useful, especially if enough good modules become easily available -- something as simple as "hey this is a 5V rated component" is nice not to have look up sometimes.

But to add to the wishlist of innovations in PCB layout; someone please give us better gerber editing/conversion tools. Geber strikes me as being very like pdf -- absolutely standard, well reproducible, but awful to edit in any way other than 'intended'.