What do you want out of a Switch 3?

[Slownenberg]

OP you are saying you don't just want a more powerful hybrid system, but it sounds like you do just want a more powerful hybrid system but just one with VR.
VR is definitely a possibility as in like 10 years presumably a hybrid handheld system will be capable enough for good VR.

I wouldn't worry much about Sony copying the Switch. Sony gamers tend to want the latest high end graphics and would complain if PS6 performance stands still compared to PS5. If Sony goes with a handheld they won't be able to have the highest end graphics, or if a PS6 hybrid model has downgraded games vs PS6 console then Switch 2 can get the same third party games anyway, and Sony fans will want to buy the PS6 console and not the PS6 handheld anyway so they won't be competing with Nintendo in regards to a handheld market.

Most likely next Nintendo system will be a more powerful hybrid system. VR is definitely a possibility. Or they'll have some small new thing like Switch had the IR sensor and HD Rumble, and Switch 2 has the mouse controls. I think everyone pretty much agrees the Switch-style system is what Nintendo was working towards during the gens of experimenting, so I wouldn't expect some crazy new experiment when they already found what works.

The focus for Nintendo needs to be on making great games and continuing to improve their services. Plenty of work to do there. Online could be improved a lot, discounts could be improved a lot, various franchises could be improved (ie Pokemon is a complete joke these days) and brought back, keep experimenting with new franchises, better planning and scheduling (this gen they've showed they were totally flatfooted for S2's launch with no 3D Mario in sight still and having to rely AA games and remakes and minor updates to last gen games to have much of anything for the first couple years). Games and game services are why people buy systems.