It is common knowledge that there is a lot of money in accessories. It is also common knowledge that most third-party accessories are shoddily-made crap.
Given all that, whatever happened to Microsoft's plans for a premium wireless controller? Backlit buttons, rubber grips, a better D-pad - sounds like a winner to me. It wouldn't be a first for Microsoft either - they already produce the massively under-utilized Big Button controllers for Scene It. Sony also has a premium accessory in their recently announced DualShock 3 controller. And, of course, Nintendo keeps churning out mostly useless - yet not free - pieces of plastic for their Wii controllers too.
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