Not an unviable option
The next XBox won't be called the 720, because that's too much like 720p, when it wants to be 1080p. The intermediary would be called the 540, not the 560 as well. Doesn't this man know his snowboard/skateboard degrees of trickery?
And I think the PS4 is exactly what he says is a PS3.5, i.e., a faster, wider (i.e., PowerXCell32 instead of Cell, maybe doubled RSX, 1GB or 2GB), but clearly the same architecture. Vastly reduced cost of development.
Beer, because it's Friday Lunchtime.