I've been keeping up on up and coming VR technology and am waiting to see if retinal projection becomes a thing. Retinal projection is mentioned in the book "Ready Player One" and is simply the projection of light into the users eyes. Imagine a projector that projects videos or a laptop screen at a wall, except it is projecting into your eyes instead of the wall. There's currently some companies (or universities?) testing this method of VR and it's suppose to be harmless to the eyes. I'm waiting for this tech to hit the market (if it does) because I think it could be very helpful for practicing control and reality checks in lucid dreams. The immersion alone, along with some lucid dream simulation game could help a person become more experienced in enacting their plans once lucid. It's an indirect induction technique for the future, but could help increase the frequency of successful lucid dreams.