Quote from blackdogHaven't yet played the first one :-/ I was tempted to install the other day but postponed as I was feeling the need for something casual. Also checking footage again, I was really bothered by the first-third person switch.
The art looks stunning again. Sci-fi nerds paradise.
A good measure of whether or not you might like the game is if you like Metal Gear Solid. Human Revolution definitely took a lot of cues from that series, and if played stealthily the two are remarkably similar in many ways. The storytelling and amount of dialogue/reading material also makes it ideal for the kind of people who can appreciate MGS.
If you haven't played MGS then all I can really say is that Human Revolution is probably one of a few games that comprise the absolute pinnacle of the last generation and games in general, and is an essential experience for any one likes shooting or stealth games of any description. It also escalates to some absolutely amazing environments later on in the game.