BR, I hope doesn't remain niche. It would be a shame to lose the only method that will ever be known for watching 1080P content.
1080P with lossless codecs will never be available through cable or Apple TV. Even FIOS is too bandwith limited.
I fear that BR has some work to do still not to become niche. They need final spec, full-featured players which require no firmware updates, are not buggy, and turn off/on, stop/resume, and start the movie as fast if not faster than current DVDs.
Further, they need to both develop a combo BR/DVD disc and figure out a way to make the format portable beyond carrying around a laptop. If BR players can't be miniaturized or copied onto a format for transport, I am afraid that J6P will see this as a negative and a step back.
I hope BR doesn't become niche, because if it does, I suspect the BDA will drop it like a hot potato in its next iteration of HDM due to the enhanced costs and start on reduced quality downloads which they will tout as tranformational.
BR has a future...just not sure what that holds.