Of course we're ignoring the earlier data since the month to date chart is cumulative and includes everything that has happened up to this point. That the PS4 has gained ground at all in the monthly chart actually implies it is outselling the Xbox One again for the time being now that the price drop bounce has dissipated.
Fair point, I get muddled with whether people are posting current rankings or monthly. XB1 has still significantly outsold PS4, though, no?
And we're completely ignoring the impact Sony's own holiday bundle can have.
It's not ignored - it's weighted. We know the bundles and we know the price tag. Basically it's the same price of entry as it's always been. XB1 OTOH has slashed the price. Knowledge of consumer behaviour is going to lead one to believe that the cheaper box is going to find a wider audience. Now of course, PS4's audience overall could be more, so reaching 5% of them at $400 will result in more total sales than XB1 could achieve reaching 25% of its potential audience at $330 (or whatever the %age values are), but that's dealing with unknowns. The known's here are that XB1 is considerably cheaper than PS4, meaning it's within reach of more consumers than PS4 which will result in more potential buyers where price is a limiting factor. It's also a significant price drop for BF, with consumers knowing the price will rise afterwards so be keen to capitalise on the offer while it's available. PS4 consumers will be no worse off if they wait so there's less impetus to buy now.
To claim we know what is going to happen going forward is ...
No-one's claiming that. It's speculation, subject to change, looking for clues as to what might happen. So I repeat the clues:
1) To date, XB1 has sold at least 2x as many units as PS4 on Amazon, the first time it's been ahead in a year
2) It's getting a significant, short-term price drop in November
For PS4 to beat it, it'd need more consumer interest at a higher price-point. Looking at the US sales (something like 1.5:1 PS4:XB1 at $400 each), do you think more people are interested in PS4 at $400 than people are interested in XB1 at $330?