Razer has always been a maker of premiere gaming peripherals, especially their mice. One of the biggest features of their gaming mice are the high dpi ratings (dots per inch) of the sensors. Most of their mice have over 3000dpi sensors, but their newest DeathAdder mouse has a whopping 6400dpi, making it the most precise mouse on the planet.
Razer is simply calling the new mouse the "DeathAdder 2013," and it packs in a 6400dpi optical sensor, compared to the 3500dpi infrared sensor of its predecessor. It's just in time for Call of Duty: Black Ops II, and we can't help but think that dedicated gamers who are wanting the slightest edge over their competition will want this new mouse.
Then again, we could only see the 6400dpi being useful for those intense gamers who might be able to tell the difference when gaming, but for everyday users, the DeathAdder 2013 (as well as pretty much any Razer product), might be a bit overkill for your purposes. The black and lime green color scheme is pretty cool, though.
However, the new DeathAdder 2013 costs $70, which is only $10 more than its predecessor, which means that if you're in the market for a new Razer DeathAdder, you'd be stupid not to go for the extra dpi for only $10 more. Any way you look at it, 6400dpi is a lot of dots, and we're really curious to see how much more accurate it is over inferior sensors.