Yahtzee is demonstrably wrong this time. The so-called 'video game crash' of 1983 was due to non-exclusivity. Consoles aren't viably sold at a price that covers their manufacture. What subsidizes that manufacture is software. In 1983 Ataris and Colecolovisions and whatever elses all had the same Pong, PacMan, Q-bert and no reason to buy any particular console. Hence, each one failed to stay profitable and the concept of home videogames nearly took one in the face. Shigeru Miyamoto's work allowed an NES to exist: a console with exclusive content. Nintendo became a powerhouse as the only place to get Mario, Zelda, Metroid, etc.
If Yahtzee's thesis was that the future can get away from this with leaps in tech and market (cloud computing giving access to games via a service and access devices become interchangable, for example) then fine. But MS is only in the console business to make sure other companies don't make that money (in the same way Google docs is a free service from a search engine/advertising company). MS has no vested interest in stopping the console war, neither does Sony and Nintendo remains the only company in any hope of a position to win one (regularly going after yet-to-be gamers, in house great-not-just-good properties). To ask for a console and NOT a console war is kinda stupid.
Even this Steam Box is just a leap down the same road. Valve will make money from Half-Life 3 to cover any other endeavor and giving developers a direct line to customers for a cut is a profitable and respectable service. Linux plus a free install of the Steam service allowing it to go home brew kicks other console makers in the teeth. EA getting jacked on Origin, X-Box/PS? being undersold and out-manuevered...all that helps not only customers but Valve in the long run. But companies still need a reason for a customer to make the choice to purchase their particular device instead of another to maintain the growth of capabilities of consoles. Even if not every experiment agrees with every customer (Wii controls for some people apparently).