"Natal consumes between 10 to 15 per cent of the Xbox's computing power." I really don't think this post is fair, not only inaccurate. MS has several options and so far they have made great decision with their business models and have catered very well to such a wide audience, when they add a new audience, existing audiences have never been affected. They have so far done a great job and given back so much for all their targeted audiences. When they were focusing on casual gamers, MS has never let down the rest of the Audience. MS has such a powerful and groundbreaking GPU & CPU, maybe not on paper. But in reality they are delivering stunning graphics. Alan Wake will blow Uncharted 2 away.
10-15% CPU usage will not even have any dent in the console performance. MS had a choice in keeping the onboard NATAL chip which handles all the CPU power, but they dropped it, because it was not necessary they would rather keep costs down. They have only cut corners the once with the launch of the first Xbox 360s but they have learnt their lesson, so if they dropped the NATAL chip, they did it for a greater reason, and not cutting corners. Most games do not use the complete power of the Xbox, so there is much more to offer on it as MS creates better software technology for developers to utilize the CPU & GPU better, optimization of the system via further software updates. Since MS are world's best software developers, I think its safe to say they know what they are doing?
MS are not like Sony they are clever, they have a solid business model, probably the best in this generation, especially with the capabilities of Xbox Live. They know that hardcore gamers provide the best revenue, so why on Earth would there be any doubt with what MS are planning for this year. I think after all MS have achieved I think they deserve the benefit of the doubt, wouldn't you agree?