Judging by this year's E3, 3D gaming is poised to become the "next big thing". Judging by the amount of money that has already been spent to develop the technology and to market it, 3D gaming is going to happen even if it causes migraine headaches for everyone involved. This is all happening at a pivotal moment in gaming, as the reluctance of gaming companies to move on to new consoles seems to show that, for most, the technology used to play games is still fine, with no major upgrades planned for the immediate future. Unfortunately, 3D gaming has, in my opinion, a few key flaws:

Aesthetics

"3D", as we know it now, is nothing new. Basically, it simulates depth by rendering two slightly different frames and layering them on top of each other so that, through some method (3D glasses), the image appears to "pop". This requires more rendering power per "frame", which means that image quality will probably take some sort of a dip to maintain a steady framerate. This is troubling to me because...

We need more resolution, not less

It is still extremely rare to see a game run at 1080p (the argument could be made that games that run at such a high resolution are usually "cheating" by using a much smaller resolution and upsampling). When a game does run at a high resolution, it often seems like the console is trying but failing to render the entire image. A beautiful game like Uncharted 2 is filled with detail and color, but also distracting artifacts that make the game look muddy in spots where it should look crisp. Now, game makers want to render two images in the time it took to render one, and they want to do it using the existing hardware. Had Uncharted 2 been developed with 3D in mind, I don't think the artifacting problem would have had any hope of being fixed. 

Scapegoat

3D, if it works, has the opportunity to allow for novel gameplay mechanics and new levels of immersion. It also has the opportunity to be used for all kinds of gimmickery. This is troubling to me because your average game could use a lot more focus on gameplay, and this was true even before 3D became a reality. Things like enemy / friendly AI and game-crippling bugs are still major problems for a lot of games, but 3D provides an out for developers by having them focus on the way a game looks, rather than the way a game plays. Developers who have approaching deadlines may be told to focus on making sure the 3D effect in a game works well, while other problems go unchecked. 

Physical Barrier

I have always had trouble getting 3D glasses to work, so I have little hope of being able to fully enjoy 3D gaming (I'm not sure about the 3DS yet, as it doesn't seem to use the same technology as home consoles). If 3D does take off, it may leave people like me in the dust. Hopefully, it will always remain an option, rather than the default / only setting.