Tamron did an analysis, gave it me to post.
He says working from a known size (the disk slot on the side) you can gauge the dimensions of it, and when compared to the dimensions of a normal ps4 you get the borrom comparison, which as you can see is WAY off the supposed "leaked" slims sizes.
Additionally he says this.
Scalng the sizes down to the second images actual size and applying real world disk and hdd sizes gives you the following.
As the "leak" has a central mounted optical drive, there isnt any clearance to include a hard drive in the machine, and thats before considering anything else such as cooling, fans and so on.
Tamrons verdict is basically, "physically impossible to be real".
And there you have it.
It's not real, but the concept and the picture is real, i bet they will look different when it's finish. and it's not a rocket science that the company already researching and planed to make the slimer console in the near future.