Hackney Wick was already in the throws of gentrification, already had a perfectly fine working train station, already had a gallery scene and cheap housing popular with artists and a brewery, all before the Olympics.
Now you have some soulless gross blocks of flats built on a flood plain that'll all be crumbling before the decade is out.
Think you're naive to what the area was before, to be honest. Without the Olympics it would have done just fine.