Slowly but surely…the number of speakers (> the basic 5.1) and flexible speaker placement at different parts of the rooms using better “wireless” signals will soon dominate the home theater arena.
I predict Sony to come up with a completely wireless spatial audio HT package soon. Will be wireless both in signal and power, they already have a surround sat that is completely wireless with rechargeable battery & is getting decent reviews, they will definitely improve on it & will probably come up with a 4 speaker set-up similar to the HT-A9