I find it interesting that the article mostly ignores the existence of the Wii and the Wii U ...
There will likely be a couple "blurry" years between the current generation of consoles and the next generation of consoles as developers produce cross-generational games to manage the risk of next generation game development. Essentially, these will be games that are designed to use the XBox 360 and PS3 as base systems (similar to the minimum requirements on PC games) and will scale up to see enhancements on the most powerful next generation hardware.
If developers get used to producing games that scale and the Wii U becomes popular enough I don't see why they wouldn't eventually treat the Wii U as the lead/base platform. The only chance Sony and Microsoft have to really prevent this is to release their systems early enough that the Wii U doesn't sell enough systems to demand a version of most next generation games.







