Mostly what was expected here, but here is what stands out to me.
A mobile chip that can be OC'ed brings laptop a step closer to desktop.
a 4/4 i5 for mobile is a great improvement, which again brings laptops that much closer to desktop, and would probably be my personal sweet spot for laptops.
m3, m5, m7 is smart, and these should see major improvements for the core-m series.
i3's are the only desktop parts increasing in ghz! the i3s will probably see the most improvement from skylake, as they are A), closer to the ideal power level B), increasing in clock speed, and C) are on the weaker end of things, which i think will result in more tangible gains (the i7s for example are already over powered in many cases, so more power see's no improvement, whereas this is not the case for the i3's).
I would love to see i4 and i6 models added to intel's lineup. an i4 could be an i3 with 6mb of cache, and suport for a higher clocked turbo mode. An i6 could be an i5 with 8mb of cache, and the clock speed of an i7, which is basically an i7 without hyperthreading. An i8 could also be cool, but i think that is called the X99 platform.