Looks like people got pissed off a bit when I said I don't really see the appeal (personally) of buying an X or One S for these BC enhancements. Seeing them just makes me feel like I'd rather just have a full blown Remake. This is also mainly because of the slew of remakes we're seeing everywhere as it is (Shadow of the Colossus, REmake2, FFVII Remake, Crash Bandicoot, Spyro, Yakuza Kiwami/2, etc etc etc), makes me want the remakes more than some resolution/minor texture upgrades. That's just me.
Many of those games you list are examples of games that were held back by Playstation hardware, though. Their fundamental design both visually and mechanically was shaped in a way that made them extremely "of their time". They needed dramatic overhauls to be up to snuff. For instance, these are both 2005 games.
Conker doesn't really NEED remastering. (Although 16:9 support would obviously be good.) I'd argue the same's true of many high profile Xbox titles. They look great. Splinter Cell: Chaos Theory and Double Agent, for instance. They're good looking games. The PC version might have some enhancements over the Xbox version, and the PC versions arguably need to be re-released with fixes for modern hardware/OSes, but the Xbox versions of those games could be bought to BC at 4K and they'd look fantastic. They'd also play fantastically because their controls are timeless. One of the issues with PS1 and PS2 games is archaic controls. Stuff like completely lacking camera control, for instance. But high profile Xbox games pretty much universally had contemporary controls. So you can pick them up and play them.
The benefit of BC is allowing these games to firstly be played by a new audience and for old audiences to play them on a new platform. But the other benefit is that these games will truly shine. A lot of older consoles had pretty poor image quality. Conker looking amazing in 2005. It's gonna look even more amazing in 2018. And the game design doesn't need to be changed or remade for audiences to appreciate it.
This is even more true for Xbox 360 games. PC gamers have long enjoyed image quality that far exceeds the console versions. They were good looking games in spite of themselves. Xbox players were shocking to discover how good Mirror's Edge looked, but PC gamers had been playing an incredibly good looking version of Mirror's Edge since 2008. It just took until recently for console audiences to have access to stable framerates and high resolution for these games.