Within this time frame the XO sold 4.1 million untis and the PS4 6.7 million units.

On average the ps4 sold 130.000 units more each week.

What are your expectations for next 20 weeks

I'd say the ps4 will sell 60.000 units a week more or 1.2 mill over the next 5 months

Year to date XBONE is at 1.04 million and PS4 is at 2.3 million.

I think that ww ratio is going to be pretty close to the ratio in the second 20 weeks.

Unless Microsoft makes a move (permanent price cut, Kinect out of the bundle) it will probably stay about the same until the XB1 launches in September in more countries.

I think PS4 will average about 120k and X1 about 70k in that time, so a difference of 50k weekly, 1 million over 20 weeks

Hmmm, i dont know.  I think it is pretty obvious that there is a imminent price cut of the x1 coming.  I think that will even it out somewhat.  Instead of 2 to 1 it will be more like 1.5 to 1 over the next 20 weeks.  

PS4 was also supply constrained during that time. XBONE's price cut and PS4's now global availability could effectively cancel each other out.

Yes, but once supply catches up demand, the result is generally lower sustained sales, not more.  Ps4 supply should be getting up to demand in the next couple months.  Coupled with an x1 price cut, the ratio should probably get smaller.

We have just to enjoy the game experience.

But, if you ask me about selling numbers, PS4 will squash its competitors in the Global.  60-70% Market share by the end of this generation.

70k week advantage on average. 20 weeks around 1,5M increased lead.

I think PS4 will continue to dominate.