I doubt Apple will offer a discrete GPU option for the new MacBook Pros because of how thin they are and the power consumption.
The m470x is a rebrand of last years card meaning it is 28nm and will consume a lot of power (and is larger physically).
Yeah I know the 13" will never have a dGPU but it's what all pro users want. The one in the Surface Book is very underpowered and, as you say, not that much more powerful than the Iris 550. The area that needs improving in my opinion is the vRAM.The 13 inch has never had a dGPU and it never will have they just don't fit within apples thermal design for that form factor, simple as that.
The only thin light 13 inch laptop to have dGPU option is the surface book and the 640m they used sits in the base not the tablet half they had to split the device to do it. It costs $2500 and the 640m is not much better than the graphics slated for the skylake rMBP with 64mb eDRAM.
Yeah I know the 13" will never have a dGPU but it's what all pro users want. The one in the Surface Book is very underpowered and, as you say, not that much more powerful than the Iris 550. The area that needs improving in my opinion is the vRAM.
In terms of power measured in Teraflops, the Iris Pro 580 outperforms the current dedicated option on the 15" so they are likely to drop is in favour of thinness. However they may have a lower power, smaller alternative since they are announcing them later in the year when the true 14nm mobile AMD cards will be released. That being said, the only ones being released are ones suitable for the iMac.
I think they should go back to Nvidia.
DDR4 will be a bit of a game changer for vram on integrated graphics it will make dedicated vram less important, I just don't see any companies bothering with dGPU's at all for anything but gaming laptops after the next 3-4 years they just won't be necessary. Apple won't go back to NVIDIA in the foreseeable future if ever, they just don't want to support their proprietary nonsense (I know hypocritical).
According to every leak, Apple is using Polaris 11 for the new notebooks, so im not sure why you jump the conclusion they are reusing a rebrand. Literally every rumor.
And it just so happens one of the things AMD is really touting with Polaris is a low z profile.
http://www.anandtech.com/show/10413/amd-teases-future-radeon-rx-470-radeon-rx-460-cards
So I wouldnt lose hope.
A computer marketed for PROFESSIONALS and they don't offer a dGPU?
Hopefully it is 4 if my calculations are correct. But I hope the 3rd port (charging port) on the left side is MagSafe rather than USB. Unlikely given the new MacBooks and the fact that the size lines up with arrangement and equal distribution along the side.I don't need or want a discrete GPU but I do want at least 3 USB ports if one is to be used for power.
While I would love the 5k display to have a dGPU, I don't see it being beneficial to the user but rather simply to maintain performance while outputting 5K. Hopefully it is more than that.Apple`s smart new we are on the brink of TB3 Apple will likely have an option for the new 5K TB display with builtin dGPU and drop the dPU in the rMBP as soon as it can. dGPU has always proved to be problematic in portable Mac`s, now they have a solution, less headache more profit.
Q-6