As Ovedius's comment lacks some tech knowledge.
Some Skylake addition.
Skylake quadcores will intengrate the pch (basically the southbridge) into the SoC. They also claim a big reduction in platform power (basically everything that is not the cpu/gpu or displays) Also the next Iris Pro should be fast enough to compete with a 750M easily.
What this means is that the logic board could be shrunk considerably.
Secondly the battery pack could be shrunk because battery while retaining the same battery life stats.
If they remove the dGPU as well because they think the new Iris Pro is good enough, the logic board would shrink considerably more.
Batteries also get a bit better every year. The battery pack is already quite old. If they did it again with the new packaging of the MacBook they can shrink it in volume even while keeping capacity the same, or they do both and get the least possible volume.
All this combined means if a redesign comes at all in next 2 years it is fairly likely with Skylake. And shrinking of the MBP is definitely possible especially if they remove the dGPU but even without doing so.
If it happens I suspect that they not make it much thinner but a little wedge shaped like MB and MBA.
I also think a redsign would likely make it loose the dGPU, ergo total performance would probably be the same.
I don't think they would change anything on the display resolution.
I also disagree with Samuelsan2001. There is absolutely nothing about Cannonlake that would change anything about the logicboard and probably not much about platform power. If they don't do anything (no redesign) but update to skylake chips, I think it is unlikely they would do anything with Cannonlake.
The next big change would be when they incorporate HBM to replace DDR4 (for the sake of powerful iGPU instead and shrinking the logicboard to almost half of what it is now) and that is much further in the future than Cannonlake.
Some Skylake addition.
Skylake quadcores will intengrate the pch (basically the southbridge) into the SoC. They also claim a big reduction in platform power (basically everything that is not the cpu/gpu or displays) Also the next Iris Pro should be fast enough to compete with a 750M easily.
What this means is that the logic board could be shrunk considerably.
Secondly the battery pack could be shrunk because battery while retaining the same battery life stats.
If they remove the dGPU as well because they think the new Iris Pro is good enough, the logic board would shrink considerably more.
Batteries also get a bit better every year. The battery pack is already quite old. If they did it again with the new packaging of the MacBook they can shrink it in volume even while keeping capacity the same, or they do both and get the least possible volume.
All this combined means if a redesign comes at all in next 2 years it is fairly likely with Skylake. And shrinking of the MBP is definitely possible especially if they remove the dGPU but even without doing so.
If it happens I suspect that they not make it much thinner but a little wedge shaped like MB and MBA.
I also think a redsign would likely make it loose the dGPU, ergo total performance would probably be the same.
I don't think they would change anything on the display resolution.
I also disagree with Samuelsan2001. There is absolutely nothing about Cannonlake that would change anything about the logicboard and probably not much about platform power. If they don't do anything (no redesign) but update to skylake chips, I think it is unlikely they would do anything with Cannonlake.
The next big change would be when they incorporate HBM to replace DDR4 (for the sake of powerful iGPU instead and shrinking the logicboard to almost half of what it is now) and that is much further in the future than Cannonlake.