i would say, why do that and still be coy about memory then?
personally i suspect they have many different renders throughout the development process.(maybe it's actually got 16gb
)
could've even been one of couple prototype's that got shelved, no idea.
have you seen images of all the different controllers, and console mockups.
it being a very realistic render doesn't make it the final or correct one
i don't think they would need to worry about being sued for showing a concept render, it happens all the time.
they gave out the specs, problem would be if specs was less than announced, and even then not like they would be sued over that either. As long as the correct specs given prior to it being sold