Yes, probably they will, but when that happens, the N can be upped even before the original schedule. I think there's value in a coin that cannot be controlled and mega-mined by 1000 sqm farms. These coins may actually be able to maintain value over longer period of time. At least the ones that survive the boom of a hundred different coins. That's why I'd like to see a proper multipool for scrypt-n too, and maybe not convert at least all of them to bitcoin. Although it's hard to know which coins will be the surviving ones.