Not a chance. The S4 is immensely popular but I would guess a HUGE majority of the sales are at a subsidized price. Tech geeks are drooling over the Google edition S4 and that's it, a very small niche. Regular consumers like have no clue as to the difference between stock Android and TouchWiz skinned Android and will in no way flock to pay $650 vs. the $99 and $199 that can pay via carrier subsidies.
Just watch my friend.I paid 600 for my galaxy nexus so I wouldn't lose my unlimited data plan and a crap load of people are buying the reg gs4 full retail to not lose there grandfathered data plans.
The only cheap nexus device was the nexus 4 and the others were just as expensive