JVC keeps improving their LCOS native contrast, I think they have the best shot at this. With HDR there's 10 times more brightness headroom, a normal image have 10 times less contrast compared to the same non-HDR setup. So JVC have so much native contrast that they are the only ones in a position to pull it off.
But brightness is absolutely a big issue. HDR has a 1000 nits reference brightness. That means the final mastering is done on monitors where a 1024 pixel value is 1000 nits. A typical home projector is 70 nits, meaning any HDR data would have to be compensated by 10 times, clipping highlights by 10 times, and thus provide no advantages.
I saw an article saying the reference is actually 4000 nits, and even 10,000 nits for Dolby Vision. Most films are mastered at 1000 nits anyway because 4000 is an impossible level with current or near future technology.
Samsung's 2016 lineup contains a few 1000 nits tvs. I saw them in the store today, and they looked like the only ones really benefitting from HDR to my untrained eye.