The new CPUs should be quite easy to predict.
It looks like the new MacBook Pros will use the 3610QM (2.3 GHz), 3720QM (2.6 GHz), and the 3820QM (2.7 GHz) Ivy Bridge CPUs. These appear to be the replacements for the 2675QM, 2760QM, and 2860QM CPUs used in the present range. This is a welcome 8% clock-rate increase.
But what about GPU?
The current AMD 6770M has just under 700 gigaFLOPS of processing power in a thermal envelope (TDP) of somewhere between 30 and 35 watts.
According to Semi-accurate, Apple are moving - back - to Nvidia for their 2012 MacBook Pros. Slightly worryingly, Nvidia's new mobile architecture (Kepler - GK107) is a 'gaming' orientated GPU, which has been GPGPU crippled.
Of the new range, the potential Nvidia replacements (for the AMD 6770M) are the GeForce GT 635M, GT 640M, GT 650M, and GTX 660M.
The GT 635M is actually a low-end re-badged last-generation GT 555 (Fermi), and whilst it has the correct TDP for use in a MacBook Pro, it only has 300 gigaFLOPS of performance. This would be a massive downgrade over the 6770M.
The GT 640M uses the newer Kepler architecture, but only churns-out 480 gigaFLOPS. I can't find any specific TDPs for the new Kepler based GPUs, but I'd guess the GT 640M is in the high 20s or low 30s, which makes it a possible candidate for use in the MacBook Pro.
The GT 650 (using GDDR5) produces 560 gigaFLOPS, and probably has a TDP in the mid-to-high 30s.
The GTX 660 is widely theorised to have a TDP of between 40 and 45 watts. This is more than that of the outgoing 6770M, but is the only card which, with it's 640 gigaFLOPS, comes close to the GPGPU performance of the 6770M.
I dearly hope that Apple uses the GTX 660M in the top-end 15" MacBook Pro (and the 17" if it survives), but I fear the best that can be hoped for is the GT 650M, and possibly only the GT640M. Whilst the gaming crowd will welcome this, this will be a horrible downgrade for those who use anything that utilises the processing power of the GPU.
N.B. I have no interest in the fact that Kepler has good 'fps' in KillyKillyDeathFace 7, I just don't care.