> You didn't see Microsoft demoing games for their Surface on ARM systems at all and for good reason.
Those were also lower-end computers with poor GPUs.
You mean the Surface Pro X? It has similar price tiering to the iPad Pro whose SoC was used in these demos.
Still, the Pro X has poor graphics. I'm going to assume that a dedicated GPU was being used for Tomb Raider—they would have said something otherwise.
They said exactly what SoC they were using, and it's not known to have spare PCIe lanes lying unused in existing products. Apple pretty much just demoed an x86 game running on an overclocked iPad Pro.
Don't be surprised if there is no Thunderbolt 3 at all, but just USB-C.
Makes me wonder how the Pro Display used in the demos was being driven. DisplayPort with USB-C alternate mode?
Were you under the impression this $500 developers kit shipping with an iPad Pro CPU/ GPU is a high end computer? While it's a decent chip, it's essentially the same CPU as the prior generation iPad Pro with 1 additional core.