When I was a teen, I would watch stuff mostly on my phone and sometimes a low-end laptop that’s like 1366x768 resolution, cuz that’s all I had.
Now I have slightly better displays, I use headphones now, but still I’m probably not going to a movie theater any time soon, mostly because I’m not used to it, and also because the Post-Covid fear still lingers, not to mention, a crowd of too many people making me anxious, and various factors (mostly anxiety of other people, but also: yaRrr 🏴☠️). I mean, its just something I never experienced so its too much anxiety for me, and home viewing experience is more relaxing, even if it isn’t the IMAX experience.
(btw: Does anyone actually enjoy theaters? 🤔)
For mobile I use a FiiO BTR7 and either my Simgot SM4’s or my Timeless II’s. They work for nearly anything with BT or a wired connection.
At home I run a 7.1 Marantz amp and a 120" 1080 projector in my home theater.
My issue is usually more of a source problem than a reproduction problem. You need high quality input to get high quality output.