3DS had one week at around 91k this year, it will likely be heavily down yoy next year and might dip into the high 60's or low 70's, in my opinion. The Wii U had at least one week below 30k this year (around 28k), there's no way the worst week will be over twice as good as that, with only one true major software release for the year and a bunch of second-tier games along with it, the summer will be brutal. I also believe the Wii U will be down at least 10-15% yoy in 2015 compared to 2014.
PS4 was never under 130k in 2014 as far as I know, so 120k sounds a bit low, it will be up yoy for sure at will likely see better average weeks due to that. Then again; it might dip below 120k as well; these are fickle times for home consoles.
I think the One could go below 80k at its worst, it had several weeks in the low 50's this year and the price cut is only temporary, not to mention that it still only has two major regions where it moves significant numbers (US and UK). I think the One will have a great year and be up a sizeable amount yoy but it might see some paltry weeks, I can easily see it falling below 80k on several occassions. A few slow week in the US is all it takes to offset global numbers a great deal.
My guess would be:
PS4: 135k
One: 65k
Wii U: 25k
3DS: 65k