I've heard speculation that it'll be around for 5 years at best before something else attempts to take over the market. Then again, I think there was a similar mindset about DVD when that was introduced.
HVD is probably going to be next to hit the market - http://en.wikipedia.org/wiki/Holographic_Versatile_Disc
It only! stores 3.9Tb of data, so I'm sure it'll be superceded pretty quickly :P