As much as I adore the original Deus Ex, I have to disagree with this. I can fire it up right now and play for hours and have a great time, but when I tried to get my wife into it she played for about ten minutes and just wasn't really getting it for some reason. Got her on HR and she just got it more.
The game is legendary, but I feel like it's become one of those, 'masterpiece of its time' type things, and a comprehensive remaster/remake could bring in a whole new demographic of people who simply need more updated, "modern", controller friendly gameplay to truly get invested in the game.
The remaster they showed was not the way, but a remaster is not necessarily a bad thing I think, if for nothing else than an updated control scheme.