Digital mosaic censorship. Worked for Stay Dead. It's either that or play and charge cables. It only took a whole generation of video games to show me that wired controllers are the bane of my existence.
The best recent example I can think of is Ninja Gaiden 2. Bodies of enemy ninjas stick around for a while as do their severed limbs but eventually they do indeed disappear. A few times when I had to back track through an area I came to a room where there was blood and ninja bodies all over the place from a fight I had before. It was oddly satisfying. Unfortunately all the demonic enemies in that game pretty much just dissolve on the spot.
The only thing that disappointed me this year was Dead Space 3. It sucks to say that because I still had some fun with that game but they kind of didn't do much to evolve the story, characters, environments, or enemy variety. Worth a rental but a full price purchase seems silly given the other great games that came out this year.