Ah I only heard the reduced the cpu overhead to less then 10%, never knew it used the gpu as well.

Oh no this wouldn't make that big of a difference.

8% of the XBONE GPU is 105 gigaflops. The current difference between the PS4 and XBONE GPU is roughly 530 gigaflops. With this rumored change the difference would drop to 425 gigaflops. That's not that big of a difference. Let's equate it to resolutions.

If a PS4 game is 1080p and an XBONE game is 720p, this change would only bring the XBONE up to 748p-752p. Now that's what the math shows instead of how things really work, but it does help demonstrate how small of a bump this would be in the grand scheme of things. It's not making it within one stage of the PS4 instead of two.

Well if it all works perfectly, using 98% of the GPU instead of 90% only results in 2.7 fps advantage from 30fps, or 1394*720 from 1280x720. Plus 100% of the XBox One GPU is still 40% behind the ps4's GPU, it's rather 1/7th closer.

In raw numbers 1.32 terraflops vs 1.84 terraflops, a 40% advantage for ps4. (ignoring other positive effects that the 853mhz clock in xb1 can have, or double the amount of rops in ps4 and memory advantages) Minus 10% reserved from the GPU, launch titles had a theoretical difference of 1.19 vs 1.84 = 55% advantage for ps4, which can now be reduced to a 42% advantage for ps4 (1.29 vs 1.84)

In practice it's far from as simple as comparing available terraflops, but CoD was a weird exception with 2.25 times the number of pixels on ps4. 900p vs 1080p seems more likely to stay, and indeed 42fps vs 60fps. Every bit helps anyway.

So snapping skype will be up to devs? Why can´t they make something like lowering the game res when i snap something. So 1080p normal play 720p while i skype seems plausible .

721p 30fps confirmed

Nah, a lot of incorrect assumptions.

First of all the boost from 90% to 98% is not the same as an 8% clock speed increase.
Secondly it's not 30-45 vs 45-60 The PS4 version will be at ~60 FPS (should mostly be in the 55-60 range though) and the Xbox One version will be at ~30 FPS (30-35 FPS ideally) and in empty environments the FPS can go as high as 45.
Thirdly you can't say an extra 8% will bring 5fps on xbox one, when you claim a 55% difference ammounts to a much smaller gap.

If it's average 35 vs 55, the extra available gpu time should bring it to 38 vs 55.

It does

Next even close, the 8% is an improvement but the effect is minor.

I know nothing about the inner workings of consoles but a question for someone who does.....

Could this open up the possibility of a Kinectless SKU??

The possibility already exists. Current systems can run just fine with Kinect unplugged. I certainly wouldn't take this as a sign that a kinectless sku is coming.