If you want to understand how I feel about stereoscopic video, replace 2D versus 3D with...
black & white versus color
silent versus sound
monaural versus stereophonic
stereophonic versus surround sound
Yes, the things on the left side can be used to great artistic purpose, but that tends to be the exception rather than the rule. Yes, the things on the right side can be used in gimmicky ways, but most of the time they just add depth (pun intended) rather than becoming the message.
I suspect, however, that stereoscopic video will indeed turn out to be a fad yet again. Why? Simply because the fundamental technology has been around for ages and it has never made it out of the fad phase yet.
Now, there have been some recent developments. There has been some movement of some technologies towards greater practicality at the consumer level. So, I hold out some hope.