It did 14M in 2014 if i remember correctly, then it will surely do 17-19M in 2015, so yes, without a doubt, with the crazy numbers of huge bundles for Q4 ( MGS V, Destiny, Mad Max, Fifa ( ok no bundle but fifa is playstation anyway), COD, AC, Star Wars, Uncharted Collection and i surely forgot one or two)

do you talk about calendar year 2014 or fiscal year 2014

ps4 did either 15.4m or 14.8m
sony is forecasting 16m for fiscals year 2015 (april 2015 - march 2016)

in 2 weeks we see the first real results for the ps4 performance on this forecast
right now, sony could easily sell less or more than last year.

all depends on bundles and pricepoints. way to hard to estimate

It'd say calendar year

IT's very very unlikely, with al these bundles, it can only do much better, last year PS4 had nothing except Destiny and Fifa as system seller, this year it has 5 times more, it will do at least 3M more, cant do less, no reason

19 million is insanity... not a chance.

17 million can happen but is absolutely the best scenario.