No doubt -- Without a very (VERY) precise, meticulously calibrated setup, along with a room that's worthy of the task, it's not even worth approaching.
Plus - No one is using surround anyway. Even the cost for the "big guys" is usually too much to get into.
Film? Absolutely. Music? Such a limited market, such expense for creating the production master (I don't even master in surround anymore - Way too expensive - and only a handful of SACD houses out there), so few who are prepared for playback (can't use it in the car, can't use ear-buds/headphones, etc.)... It makes me wonder why all these programs author DVD-A...
I know precisely two people with DVD-A players - Including myself.
Just wondering if it's worth remixing my last project and whether I would need a sub woofer or just any 8" woofer for bass.
If there's a demand for your last project in surround and you have the $$$$.$$ to cover the cost of creating the replication master, there you go. As mentioned, you would need a sub - Precisely matched and calibrated to the rest of the precisely matched and calibrated system.
THAT ALL SAID:
If you have enough channels of DA and you want to just hook it all up to "screw around with surround" then by all means, go nuts. Just keep in mind that the listening experience will probably go beyond that room. Surround is kind of fun to mess with, depending on the source anyway...