One of the biggest things Sony did during their E3 presentation, aside from announcing used games support, was reveal the $399 price point that made it $100 cheaper than Microsoft’s Xbox One. According to IGN and other sources, the next-gen system from Sony was originally going to come in a bundle similar to its competitor, and would contain the PlayStation 4 Eye camera and retail for $499.
Sony managed to keep their changes quiet, in an attempt to (now successfully) get a one up on Microsoft, even going as far as to not inform retailers of the price change and only the exclusion of the camera. Now, the camera will be sold separately at a price point of $59.99, but some features of the DualShock 4 may now go unneeded, such as the PlayStation Eye being able to detect where in the room an in-use controller is and rearrange the split-screens to give a better view.
Overall, though, I think consumers enjoy having the option to purchase the add-on camera or not (options are always good!). And besides, with the PlayStation 4 controllers being wireless, its not like you have to worry about tangling wires, should players find themselves moving around the room a lot. The only real problem is finding the strength to get up and move a bit. And who wants to do that?