I have researched a little on the new Haswell CPU's for mobile, and here's my thoughts of what we're going to see in the next months with an rMBP update: If we are to assume that the wait is because Apple waits for the Iris Pro CPU's, there are three choices (HQ models): i7-4950HQ (2.4-3.6GHz), i7-4850HQ (2.3-3.5GHz), i7-4750HQ (2-3.2GHz). The i7-4950HQ runs same base- and turboboost-frequency as the current base-model, but I suspect that Apple will maybe make a cheaper base-rMBP if they discontinue the cMBP's. If that's the case, the base model might be a i7-4750HQ (2-3.2GHz), which should deliver the same, if not better performance as the current base-model's CPU. The Iris Pro performs almost as good as the 650M in the current rMBP, so they could remove the dGPU from the base-model. And that would actually not be a bad idea. According to Anandtech's benchmarks of Iris Pro versus 650M in rMBP, the two are actually pretty close! Furthermore, the Iris Pro versus HD4000 in rMBP, Iris is a whole other league, that almost doubles the performance against HD4000. So running only with Iris Pro in a future rMBP base model, would give a huge performance boost in 99% of the time; I guess we'll se no more lags. When browsing and navigating the UI, it would be as if the user have forced 650M in the current rMBP, just with better battery life, and of course: less heat! So this would be the logical way for Apple. Discontinue the cMBP, and then a base model of rMBP with only integrated GPU. That would performance-wise be like the current base-model, but have an improved battery life. If course, as rMBP is Apple's flagship, they would also have to make a better version with discrete GPU. 750M would be a good guess. This model would have the i7-4950HQ, which have the same frequencies as the current base-model. Or maybe Apple would even go for one of the MQ models, which doesn't have Iris Pro, but instead HD4600. This could justify the small performance gains there would be with Iris Pro vs. 750M. That MQ model could be the 4900MQ (2.8-3.8GHz). Actually, I think, that most people would benefit most of the base-model then. Although the frequency is smaller on paper, the performance would be same as the current base-model. So why would you buy a laptop with same performance as last year's IB rMBP? 1) Better battery life (no dGPU) 2) Better overall UI responsiveness (due to Iris Pro being way better than HD4000), 3) CHEAPER! As a non-gamer, I think that I would be ready to go for a model without dGPU, and use that saved money on a larger SSD and more RAM. I think mainstream gamers would do that too. Pro's could then opt to the better model with discrete GPU to handle their games/video-editing/whatever. What do you guys think?