I don’t have much first hand experience with MTM soundbars. Most I’ve used or tried were just single drivers per side.
For pure frequency reponse, I’m sure they’ll be impressive for their size. And all the regular MTMs I’ve heard have amazing Soundstage. From what I’ve read, the sideways versions become narrow, but there are many from the big companies out there that are this way, so it must be quite usable. Nick ( @123toid ), what’s your further take on them? I know you definitely have experience there.
As far as tilting the front, I doubt you’d have to change anything. I only thought of it because you’d tend to be higher above the ear with that mounting than you would be below the ear with the under screen mounting. Maybe the sideways lobing will be a benefit in this situation. 🤔