I think this shows a lot honestly.
It shows people clearly want new or different experiences in many ways which is why BF1 did so well. If it had just been another modern setting shooter it likely would have bombed as well. The setting of it really brought it to a different place, we'll see if it can retain those sales through the holidays but its pretty easy to guess why it did so well.
It also shows that people do want remasters but they want them to be properly done. The lazy remasters aren't selling worth a shit but the ones that are really being reworked like Skyrim are doing really well.
Tomb Raider was doomed, SE making it Xbox One exclusive for a year just pissed everyone off, it didn't matter if it was going to do well and if I remember correctly even then they put it up against Fallout 4 last year, that was a really dumb fucking decision and for this PS4 release they decided to still charge 60$!? Like you you serious? IDK if it has all the DLC or whatever else, no one wants to pay 60$ for a year old game.
Titanfall is the least surprising thing, it had everything going against it. Going right up against both Call of Duty and Battlefield, releasing against Skyrim remaster, making the original exclusive to one platform, ect. It's hardly surprising it bombed after all of that and its a damn shame because EA is at fault for all of it.
However I think the biggest take away from this is that people are just tired of having the same experience year in and year out. Many of these games aren't yearly sequels anymore but so many similar games are out now. Third person shooters, first person shooters, everything is a shooter or has shooting elements in some way and people are just flat out getting tired of it. It's part of the reason I think the Skyrim remaster did so well, people remember that game fondly and its very different then everything else that is out right now. BF1 may be yet another FPS but its not a setting that is generally explored and the development teams did a really great job on it (and its crazy to think that EA hated the idea of it, they just don't understand the market at all >.>)
FFXV has the same chance but I think they fucked themselves with the delay and a lot of the negative press surrounding it. That Conan segment was pretty funny but it makes the game look like garbage. I think it'll still do okay but I don't think the name alone will carry it as much as it might have back in September before the delay, it was almost a bad joke when it got delayed again after so fucking long.
I would like to believe that this will show publishers they need to stop playing it so fucking safe with every release and let their developers take risks and experiment but if I'm being realistic then most publishers are stupid and only care about making as much money as they can in as short of time as they can instead of thinking long term. Those that do think long term have lasted for a long time and have series that have lasted decades and always been popular, those that don't end up doing really well at certain times but the drop off happens fast and before they know it the rug has been pulled out from under them.