Sorry, I find reboots to be a hit and miss really. Even when they are successful, it's still a combination of how much the fanbase has been waiting for it, how well they maintain the theme of the original, who's developing it and how much hype has gone in. All things that are miles away from it actually being a good game or not.
Out of the list provided, well therein lies the hit and miss for me.
-Doom 2016: Yes, enjoyed this game very much and glad to see it rebooted, in an effort at least to maintain the theme, pace, and enemies of the original. Monster arenas or not, it was fun. Personal opinion though, I still prefer Doom 3 and it's expansion(s).
-Prey: Actually looks kind of boring with the enemy types, I'm still waiting for this to go on sale. I still don't understand why the fuck they need to call it Prey, when it's every attempt is to be a successor of System Shock. But I'll reserve any judgement until actually playing it.
-Hitman: One of my favorite franchises of all time. The episodic nature didn't bother me that much, I usually just buy them once the whole game is out anyway (Telltale games, Res Evil Revelations 2, no probs). But the always online threw me off. Sorry, I just can't do it on my connection. It's probably fast enough, but extremely unstable.
-Shadow Warrior: Had fun with this one, not the game that I've been craving all my life. I enjoyed carving my way through it, but not that much that I need to go in again for the sequel or anything. It's a big enough game on it's own, and more than enough nostalgia for me. I do prefer the epic arena battles here to Serious Sam though.
-System Shock: Don't know enough about this to comment, but what the hell. If it's anything like the Bioshock series which I adore, then it's worth a look.
So in all, definitely not the best thing. Something to keep things going, yeah alright. Resident Evil remakes seemed to do well, but other than that, I would still say I prefer sequels to reboots. XCOM being the exception, probably one of my favorite games of all time, and I was even disappointed at the beginning at how simplified it was.