35W CPU already was in Retina MBP. Apple will not go for 15W CPUs in MBP. They are reserved for MBA. Also 15W CPU will not have Iris Pro. Iris GT3e will be there but in 28W CPUs.
Edit. Ive read right now that 15W CPU will have Iris...
That means the latter went a bit further. MBA will get dual core CPU with Iris, 13 inch MBP will get Iris with eDRAM, and possibly quad core with, Iris with eDRAM(GT3e) or GT4 iGPU.
This time however, I will not predict the performance of each stage of GPU. I will be pleased if GT3e will be able to get 3000 its in 3dMark11.
Wow, I hope this is true! I really hope the next 13" MBP update GPU will have some form of build in memory, either GT3e or GT4.