Returning to the original theme ...
Is it worth replace a 2015 MBP for a 2017 nTB? Or waiting for a 2018 MBP (if there is) ?
There will be a 2018 MBP, and it’s worth waiting for.
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It's true that Microsoft only used 15W CPUs in the new Surface Books. When the new 15" MBP launch with their 45W 6-core CPUs, the Surface Book will look quite weak in comparison.
Having said that, if you need to buy a notebook now, the compromise Microsoft made is quite a good one. The 13" model comfortably beats the 13" MBP in both GPU (GTX 1050 vs Intel HD 650) and CPU (8th Gen quad-core i7 vs. 7th Gen dual-core i7), while the 15" model sacrifices some CPU power for GPU power - the GTX 1060 should be almost twice as powerful as the Radeon Pro 560. Not a bad spot to be in for Microsoft, at least until the next gen MBPs are released, which might take more than six months from now.
Yeah I agree, the 13” Surface Book 2 is the perfect MacBook Pro 13” in terms of specs, even with the 15W processor only (its worth the trade off for better graphics). As for the 15”, I still would like to see Apple include better graphics, the current offerings are kind of a joke in comparison, but I think they should stick with the 45W chips due to the core bump. They could go with a Max-Q models, in which case they could probably implement a 1050.
Other than their deal with AMD, their advantage was the fact they could offer optimised cards and have lower power usage. That is no longer the case.
Of course, I want AMD to stay around for competition (although this wouldn’t majorly impact them), they’re not producing the best hardware. In a lineup where there is no choice and the cost savings are clearly not passed onto the buyer, there is no point in using AMD. The switch to Nvidia needs to happen, this is roughly how it would be:
13” MBP = MX150
15” MBP = GTX 1050
21.5” iMac = GTX 1050, GTX 1050Ti
27” iMac = GTX 1060, GTX 1070, GTX 1080
27” iMac Pro = GTX 1080Ti
There could still be options, e.g. the iMac Pro could have a Vega option as there are still benefits there.