How long will it take XboxOne to reach the install base of the 360?

it may never. it received poor reception upon launch, causing Microsoft to do a 180 on a lot of their policies. but the initial bad reception hurt it's overall potential. while the S and X were a success, many were put off of the Xbox One overall. plus, they announced they are working on the next gen console already, code named Scarlet, with possible release target in 2020, with a possible announcement next year. but, if they learned their mistakes, Scarlet should easily surpass PS4, and make Sony nervous of what Scarlet can do.