The 980H was pretty darn good on audio, especially for a $170 DVD player, but it was also just a $170 DVD player. The Musica retailed for $1,100 and was a dedicated two-channel product, so it's inevitable that the analog audio performance of the 980H sounds a bit lacking in comparison.
The BDP-80 used a similar analog section to the 980H. To varying degrees, every other OPPO Blu-ray player will exceed the 980H's performance. The BDP-83 was a significant step up from the 980H (rivaling or exceeding the analog performance of my Onkyo PR-SC885 even with the 885 benefiting from Audyssey), and the BDP-93 is if anything a bit better than the BDP-83. The BDP-83SE is due to be replaced by the BDP-95 in the near future (next month or two). I haven't heard the BDP-95 and don't know when/if I will get to, but the BDP-83SE is a very, very good player that will soon replace the 980H in my dedicated two-channel system. I don't know how they all relate to the Musica (since I've never heard it), but I suspect the 83 and 93 will compare very favorably and I wouldn't be surprised if the 83SE and 95 could match or beat it.
As for the notion of Blu-ray being superceded by streaming, my experience with streaming so far makes me think that Blu-ray should be around for while to come (as will DVD). There's the convenience and direct personal control over physical media (no need to wade through the growing medley of streaming services or worry that the one you picked will go out of business in a year or two), but even more notably there's the quality benefit inherent in being able to spread a movie across 50GB of disc space. Streaming may be a great tool for certain things (watching old TV shows being one of the biggest successes that Netflix's service has had, for example), but it doesn't yet match Blu-ray. There's also the audio benefit to Blu-ray. It has given artists a way to deliver lossless high resolution audio (either stereo or multichannel) at a quality equal to SACD and DVD-Audio, but on a format that doesn't have the stigma of being restricted to a niche market. I question the long-term viability of 3D (mostly because of how badly the industry has dealt with standards for 3D displays) but I think otherwise Blu-ray has a lot of long-term potential.