Assumptions: Core-M will replace Core i3 as the low end CPU in SP4. Core-M 5y10 (lowest Core-M) provides about 25+% better performance than Core i3 4020y. Skylake Core-M will improve on that by an unknown amount, possibly significantly. Atom x7-Z8700 gives about 75% of the performance of Core i3 4020y and speculatively about 50% of the performance of the low end Core-M 5y10 variant and even less vs Skylake Core-M. There should be an additional (future, late Q3 2015) Surface 3 model in between the current top model Surface 3 and the low end Pro SP4 model. In fact with the Pro being the larger 12” and 14” devices (assuming rumors are true) it would be ideal to have a Surface 3 model with similar CPU performance as the low end Surface Pro. i.e. At least Core-M 5y10 with higher performance 128GB SSD, 4 GB Ram, same 10.8” 1920x1280 screen. Although the Pro may have a higher model Core-M CPU like 5y71. The non-Pro should be fanless. I wont speculate on the Pro. Note: These should all be the equivalent Skylake versions of the Core-M. The top Surface 3 going into the holiday season would then be more than competitive with the yet to be announced iPad Air “3” performance. With the Pro line having Skylake Core-M, i5, and i7 models it would be a very strong line up. Kinda like the "Murderers' Row" of the tablet/hybrid world.