No. 5.5tf machine, and no one would bat an eye at $499
4.2tf and $499 would be the deal breaker. But that's as unlikely as an i7 CPU upgrade in the Neo.
4.2 $399
5.5 $499
That's my prediction.
I just think that GPU power should not be Sony's priority.
It would not be worth 100 extra bucks for them to upclock the GPU.
You go from an overkill GPU which will eat anything thrown at it for breakfast by default, to an even faster GPU which generally speaking, will be even more constrained by the bandwidth from the GDDR5.
Your going to hit the heat limit with that GPU overclock as it is, and the upclock to the RAM to speed up the bandwidth fast enough to take advantage of the GPU i[ clock won't be there, because you have used up your power and heat budget for the entire unit to overclock the GPU as fast as it will go.