Hmm but when that argument was applied to phones, Android essentially got punished for being more open than Apple - you actually can have other app stores on Android, therefore Google could be held accountable for anti-competitive actions in the Android app marketplace. Whereas Apple doesn't allow any third party app stores so there's no competition in the first place and they're fine!
Retarded logic but I feel like if you apply the same logic to Sony, they'll also be fine.