Game performance matters, and it matters a lot. Arguably, if you want to gain the respect of gamers, you need to be able to put out a product that can consistently reach 60FPS and look good while doing it. The folks at Digital Foundry have been analyzing the performance of many PC games for years now, and their latest piece was done on Square Enix's Deus Ex: Mankind Divided. Long story short the game is performing relatively well on all platforms, although some are fairing a bit better than others.
While PC resolutions depend on your hardware, Xbox One's hit 900p and PS4's are hitting a solid 1080p. Both consoles are given solid anti-aliasing, although they tend to be plagued by an odd, unappealing sharpening effect - an effect that PC users get to turn off if they choose to. Consoles also get the disadvantage of generally being stuck at 30FPS, which could definitely disappoint a lot of gamers who are used to very strong game performances. On the other side of that coin the 30FPS guarantees a fairly stable experience for console users, so if you don't care much about the 30FPS/60FPS difference you're going to be just fine.
There's a certain trade-off that you have with either the console versions or the PC versions when it comes to loading times. When you're on PC, initial loading times in an area tend to be a bit longer, but your loading screen after death is significantly shorter afterwards. Console users enjoy a shorter initial load time, but your time in a loading screen will stay at that same length when you die. You won't die often if you're playing on an easy difficulty and aren't trying to do a stealth/non-lethal playthrough, but if you're planning on a challenge then you'll probably have a better experience on PC.
All around, the most stable experience is on PC, with consoles performing admirably enough in their own right. The PS4 slightly outperforms the Xbox One, bringing out a better resolution and slightly shorter loading screens, but you'll be able to get a good experience out of any platform that you choose.