HappySqurriel on 02 May 2009
Momentium, inertia and friction are good concepts to use in a discussion of sales trends ... but I don't believe that you can apply them to "Brands", and even if you could the methodology in this is questionable and the application of the terms is bad.
Basically, the PS2 in the previous generation had the highest sales (velocity) and the largest library (mass) so it took much longer for the PS2 to slow down and stop than it did other consoles. If there was momentium associated with "Brands" rather than "Consoles" one would have expected the PSP and PS3 to receive a massive benefit from the PSP, and the Wii never would have taken off (because of the low momentum of the Gamecube).
