I predict 1.2-1.25 million PS4 this year.
September: 100-120k
October: 60-80k
November: 80-100k
December: 180-200k
Even accounting for the post-holidays drops, numbers are quite nice. AC and YW keep selling quite well, and show legs. Taiko PSV is not having much legs and sales are quite low - there will likely be another PSV entry next year.
YOY changes:
3DS: -15%
PS4: +0.2%
WIU: +0.2%
PSV: -27%
PS3: -56%
PS4 YtD 2014 (MC numbers): 970.667
So far the YoY increase is not that high (0.2%) but due to launch numbers of last year, I suppose. Recently, since the introduction of Bloodborne code and the announcement of DQXI, it seems to have increased its pace compared to last year. I'd say that a 10% increase is doable, so I tend to agree with the 1.15/1.2 millions as YtD 2015 for PS4, unless Sony will introduce some sort of price cut alongside the Christmas festivities.
About Wii U, YtD 2014 (MC numbers): 618.150
So far the increase is the same as PS4, +0..2%, but the Splatoon launch effectively changed its weekly baseline. Last year's bundles were uneffective in terms of holiday bump: this year one's is actually even worst in terms of actual "economical value", but I think that Wii U's ability to beat its past YtD is baed on the possible Super Mario Maker popularity. If the game will gain momentum, alongside an "evergreen" Splatoon it could lead up to a small YoY increase, anyway probably smaller than the PS4 one, so I'd say that it could end selling around 650k YtD 2015.
Despite it being the only console actually successfull in Japan, 3DS YoY comparison will be the more "tough": last year's YtD was 3.176.525 thanks to the NEW models introduced. I suppose that in a month and a half the YoY comparison will be way worst than the actual - 15%. I think it will probably end around 2 millions YtD 2015, with a drop around 33% or higher.
I imagine a similar drop YoY even for PSVita (1.168.570 YtD 2014, MC numbers), that could end up around 850k YtD 2015 I suppose.