We've said it before, but our favorite application for 3-D--really, the only venue in which we don't hate it--is gaming. Nintendo just released the 3DS XL, basically a bigger version of the glasses-free 3DS we reviewed here, and it's great. Here's why.
What is it?
It's a dual-screen portable gaming system, the latest of many iterations of the Nintendo DS (others: the DS Lite, DSi, DSi XL, 3DS). This one takes the 3DS, with its glasses-free 3-D top screen and touchscreen bottom screen, and enlarges it--the top screen went from 3.53 inches (small!) to 4.88 inches (pretty big!). It also has two cameras on the rear for taking 3-D pictures or playing augmented-reality 3-D games, plus one in the front for video chat. It has Wi-Fi to download games and do a little social networking and other web stuff.

Downsides?
It's not really pocketable, at least not for me. But neither is the PlayStation Vita, and neither is a Kindle, for that matter. The bigger screen is definitely an improvement, but it also retains the same resolution, which can make things look more pixelated. The 3-D effect is fairly easy to lose--if you change the focus of your eyes by looking elsewhere, or the angle by moving your head, you kind of have to concentrate to get the effect to come back. The speaker is, curiously, not as good and not nearly as loud as the 3DS. And the games library is still a bit thin. But if you're going to make the jump into portable glasses-free 3-D gaming, the XL is definitely the way to go.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.


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The resolution could have been higher but I'll buy one if I can get 3D movies for it.
I sold my original 3DS because I just don't spend much time gaming these days.