In terms of resource usage, the 'games machine beast' PS4 is pretty much on par with multimedia box the One without any of its features. That's the problem. I'm a Sony fan, but it's funny how it was all about how much RAM ps4 had for the games, and how Microsoft was shafting gamers using up all of those resources for media functionality, but now all of a sudden, the narrative is 4GB is enough. If it was enough, no one would have ever raised a peep about the One... The problem is that PS4 is blocking off just as much, if not potentially more RAM with nothing to show for it and I fail to see how that goes along with the 'all about the games' script Sony was spouting off.
Developers may not be able to use all of that RAM now, but they will down the line when games become more complex and something we may see is that they will start designing their games around the lower base standards now instead of designing games to exploit that additional resource. If 4 GB is enough RAM, Sony should have just stuck with 4 GB and used the money saved on that GDDR5 and put it into a more powerful GPU or processor. Microsoft actually has dedicated features using those system resources. Sony doesn't, and yet is blocking off more. People are just curious as to how is that possible.