So, I saw a few articles floating around the 'net to day that were talking about how Sony apparently removed the PlayStation 4 Eye from being bundled with the PlayStation 4 to allow them to beat Microsoft on price. Now, I really don't doubt this as I was actually surprised to hear that it wasn't bundled at E3 as that was the impression that I got from the reveal event.
In those articles, I noticed a prevailing opinion that this is sort of the death knell for the Eye, but honestly, I think that's being a bit premature. I keep seeing them mention that without the super-high attach rate, developers won't be as keen on producing content for the device. Now, I'm not saying that there isn't truth to that statement, but I think there's a bit of ignorance in there when you consider that bundling it with all consoles would create100% forced attachment. Saying that all the people who buy the console (and consequently, the camera) are going to use it or are interested in it isn't really something that you can prove, and it's about as foolish as saying all any pirated download is a lost sale.
However, I do think that the Eye has one big advantage: price. The Eye is only priced at $60, which makes it the same price as a controller. So, if someone is interested in a game that requires the Eye, they aren't making a huge investment like the original Kinect was ($150). In fact, I think Sony would be wise to offer a bundle with a controller and the Eye for $100. You're preying on someone's desire to get a good deal.
Ultimately, as many of you would probably say, how much the Eye sells and how much the Kinect gets used is going to depend on the software. Flicking little robots around is fun for a little bit, but we need something real. If Sony wants good software, then they need Harmonix to release Dance Central for the PS4. Excluding bundled games (i.e. Kinect Adventures), it's probably the most popular motion-based game that I've seen so far.