After last week, that XBOX ONE have sold less of 65K, and less of Wii U (68,000) much people they said; "XBOX ONE DOOOOOOOOOOM!!! Is CONFIRMED DEATH"
...
Ok, for one price drop this is bad week, and it is useless to deny it, look the 3DS, 364,000 the week of price drop, and before have sold 40,000 (+800%)
http://www.vgchartz.com/weekly/40769/Global/
But only for this reason i don't think that XBOX ONE is doomed...
1) XBOX ONE is coming only in 13 countries.
It's true, the new countries is small, or not suitable for console ecc, but i think that minimum XBOX 360 have sold 10% of the total number (80,000,000-8,000,000)
So, if XBOX ONE was out in all countries, they sell +8/9 %, so one total of +5,000,000.
2) Like Wii U have sold much good with Mario Kart 8, much people forget, or pretend to forget that for XBOX ONE will coming Halo... and not only: Quantum Break, Master Chief Collection, one new Gears, and also some multiplatform games, that don't greatly increase, but helping XBOX ONE to sell good.
This is my prediction: XBOX ONE will sell much good this chrismas with Master Chief collection, Destiny, Assassin's Creed Unity, and more, thay continue to sell bad on Genuary, and when coming Halo 5, XBOX ONE will sell good for rest of life.
Also, add that some user have said that XBOX ONE sell less of GameCube lifetime (-22,000,000?).
IMHO i predict 50,000,000 of XBOX ONE, in the worst case scenario 40,000,000 that is a good number.