Alby_da_Wolf on 15 February 2014
Very difficult. Anyway, we'll be able to make lifetime predictions that make any sense im 4-5 years, not earlier. Judging just from Wii's first three years we could have predicted 160M or more in a 10yrs lifecycle (including 3 years as cheap model after next gen launch), and it would have been sensible IF things kept on going so good, but Ninty shot itself in the foot, killing Wii too early, and the Wii brand with it, so killing not only Wii, but making Wii U be born crippled too.
Even if Sony won't shoot itself in the foot too (we know it will, it always does it in some of its divisions 
, but probably it won't with PS4), nothing can grant us now that both things depending on Sony and those out of its control will keep on going well enough.
