I don't get the logic behind launch later, earlier, whatever just so that it doesn't come out on the same frickin' day another game comes out. Do people seriously think that people have the budget for just one single game and that any game not bought on day X is a lost sale for good?
I might be willing to concede that launching close to heavy hitting games on the same day perhaps to limit sales. Better to find a time when there is no competition. But launching a game now just before christmas has other benefits; It's Christmas, console sales are at a historic high and there are lots of people who are either picking up consoles for themselves, for their kids, for whoever and with it, probably games too. Tomb Raider lack luster sales have little to do with Falllout 4 - there are not even comparable games, not even close. And even if there are people who like to play all sorts of games, doesn't mean they would just as well pick up two very different games for very different types of entertainment. I've been switching back and forth between Fusion Trials and Witcher 3 the last few months, sometimes between Trials and MGS5. So what? No, the lack luster sales of Tomb Raider on the Xbox is simply because the game did not have the best appeal on that platform, as simple as that. If you look at historic sales of Tomb Raider across all platforms, it is evident most fans are on the PC and on the PlayStation. This time around, it's even more tainted to the PlayStations advantage since we know lots of ex Xbox owners have bought a PS4. So it just shifted even more to that market.
Now, launching together with Uncharted 4 - well, that might pose some issues since the games are rather similar. As a fan of both series, I wouldn't hesitate a second to buy both on day 1. Worst-case; I might get one sooner, the other later, but I'd definitely get both eventually (at full price). So within a time frame of 3 months, it wouldn't be a lost sale either way for either games. Neither will it be on the Xbox when it launched close to Fallout 4. Some people might have decided to go for F4 first, but they will eventually get Tomb Raider too (if they had any interest at all in it).