They may make upgrades to heavily congested areas. But the vast majority of users won't see any tangible speed increase.
AWS is only going up in heavily congested areas right now, such as Detroit, Chi, LA, OKC, Boston, NYC, etc. There is no reason for AWS anywhere else.
There are reports of slow LTE speeds and unusable data in LA right now. I do agree that majority of users won't see any difference, but that's because they don't have an S4 or 928 to take advantage of AWS.