There's fully immersive, and then there's hyper immersive.

What you want is the PS5 equivalent of VR. A mature technology that delivers experiences people could have only dreamed of 30 years ago.

What you think you want is the PS9/PS10 equivalent of VR where it's perfect - completely perfect.

What technology was totally perfected before a fan of the concept of that tech bought in? There aren't any I can think of. There will be new people who aren't interested in VR until it's like the matrix, but that's because they don't even like the concept of VR or the matrix, but get pushed into it anyway out of necessity or because they can't help it.

If you're a fan of VR - the idea of VR, then you will find value in VR long before a full brain interface. VR is already very immersive today, and we will genuinely get to hyper realism levels of immersion in the next 10-15 years. It won't be a brain interface, but it will be at existential-crisis levels of immersion - and no fan of the concept needs any more than that to buy in.