I think Sony have been incredibly clever this generation in multiple ways, but perhaps with the camera most of all. You see, I imagine at some point the camera was included with the console and was later cut to reach a more affordable price-point, something that makes the console a lot more desirable than the competition's. This may look like they don't care about the camera, but I don't think that is the case.
When you look at Kinect, what do you dislike? Is it the voice commands, or is it the need to wave your arms around? I would bet my life it is the latter as the former is actually quite cool; a gimmick for sure, but cool and handy nonetheless. You may be wondering where I am going with this.
So developers look at Kinect - an integral part of the Xbox experience - and see what voice commands they can implement alongside the less enjoyable/intuitive motion controls. They then code the voice commands as every Xbox has a Kinect, but they also look at the PlayStation camera - which many but not all people have - and think that they can easily make the voice commands work for the PlayStation version of their game. They then decide to include voice commands for the PlayStation version of their game too - see Tomb Raider.
Do you see my point now? Sony don't really need to push the camera as Microsoft are doing it for them, whilst allowing Sony to maintain a cheaper price-point. When Microsoft included Kinect they made it necessary for developers to use the device in some way, shape or form. Thus making developers push Sony's device too. Very clever Sony.










