hoping some truth to this. Cause Intel's ridiculous, and non technical reasons for blocking external GPU's over thunderbolt sucked. was purely done cause they were trying to milk more money by forcing you to stick with their solutions.
even back when they introduced Thunderbolt on the MBA's in 2011, they were able to (through hacks) run an external GPU, and at least provide a mediocre level of gaming.
It was really a shady move by Intel. But it looks safe this time. There is an in depth article from anandtech about Thunderbolt 3, where Intel confirmed it.
Intel said:Meanwhile gamers will be happy to hear that Intel is finally moving forward on external graphics via Thunderbolt, and after more than a few false starts, external GPUs now have the company’s blessing and support. While Thunderbolt has in theory always been able of supporting external graphics (it’s just a PCIe bus), the biggest hold-up has always been handling what to do about GPU hot-plugging and the so-called “surprise removal” scenario. Intel tells us that they have since solved that problem, and are now able to move forward with external graphics. The company is initially partnering with AMD on this endeavor – though nothing excludes NVIDIA in the long-run – with concepts being floated for both a full power external Thunderbolt card chassis, and a smaller “graphics dock” which contains a smaller, cooler (but still more powerful than an iGPU) mobile discrete GPU. From http://www.anandtech.com/show/9331/intel-announces-thunderbolt-3

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