A setup with components tailored for hifi music listening will also sound great for movies ( there is less scrutiny from the ear for movies than music). But, it won't necessarily be true the other way around.
In bedrooms where one may not always have room or the WAF for a full Atmos/multichannel setup, a good 2.1 stereo setup should indeed do a lot better than tv speakers. There are speakers that image great and throw a deep holographic soundstage that you may start to swear that you had a center and surround speakers active, when all you have is 2 speakers upfront. It won't be like a full Atmos setup though. If you pair it with some 2 channel receiver like a R-N803 (1 box stereo amp that should come with a lot of features offered on Yamaha's Musiccast platform), it could serve for a decent sounding compact bedroom setup that doesn't take over the whole room. I am not sure what else is out there. You could also see if Marantz has something similar as well.
On the positive side, it looks like you have the WAF to bring a couple of speakers into the bedroom at the least. I only have the WAF for an awful soundbar in the masterbr.