Becaue they are making profit per unit - which is what I said. All I was meaning is that they are unlikely now to go back on that method and start selling units for a loss (not to mention the amount of loss MS and Sony make per one sold)
Im not knocking their method, Im just saying that therefore they will probably still be one step behind (to keep profits high), rather than come back in generation or two where initial costs are astronomical, all the parts are pretty costly and per unit of hardware is sold at a loss