In the US, digital games cost the same as retail and when a retail game gets a price drop the same is not always true of the digital version.
Heh...Valve achieved success by forcing you to use their online DRM to play Half-Life 2. Then they persuaded companies to release their games through that service. Basically if you wanted to play their highly anticipated game you were forced to use Steam and it was terrible at that time. They've had almost a decade to update it since then and it works well. That doesn't mean they are doing anything because they care. Why do you think they are doing a steamOS? It's because they want to control everything about game distribution in their own ecosystem, not because they care about gamers. They want to abandon DirectX. How is that good for gamers when almost every game out there uses DirectX? They are afraid Microsoft will offer competition through Windows 8 so they fear monger about it and troll the internet telling everyone MS is evil. I for one do not buy into that crap.
On the whole Kinect thing, if they remove it...you will lose a lot of features. The system won't turn on all your electronics, you couldn't mute your TV through the xbox system, you couldn't auto log on to Xbox Live (it doesn't work without it), you couldn't scan QR codes to redeem special content and stuff through the store and with no keyboard support it would be painful having to enter multiple codes that are 24 characters long.