Trust me, "everything" install media as you described will exist for F7. Maybe it'll just be a 20G bluray iso since nobody cares enough to do the whole disc-split-pkgorder stuff, but it'll be there. (wearing only my non-corporate-sponsored bad-track-history prognostication hat).
Yes, but the question is wether it will be only accessible by "Bittorrent" or not as expressed earlier in this thread. Btw, a total size 20 GB is largely exaggerated. I would rather expect 2 standard DVD images per architecture [not counting the sources which have always been shipped separately].