What i mean is, this gen the consoles weren't super easy to program for and developers had to learn a lot over the years how to handle the consoles. Better tools were very important so was experience with the consoles. it took years until developers really understood the PS3 and i'm not sure if some still learn a lot about it because they don't really understand the console yet lol.
But next gen looks very "easy" to work for from day one (or let's say after some months with the final dev-kits). Sure, we will also see better tools from time to time (especially the release games won't be really what next gen will show us) and experience will be also important on PS4, Wii U and Xbox One but there isn't a huge hurdle and without this problem, games should show much earlier what the consoles really can and developers could reach much earlier the moment where visible progression won't be that big anymore except for some little tweaks from game to game.
Edit: This would be obviously a good thing because getting the best possible graphics some years earlier because of easy development can't be bad but the "wow" moments could maybe happen fewer times.
