My local supplier tried to sell me something like that . . .
. . last time it was new mattress time (about every 15 years), but I don't need anything like that. So far nobody has had any problem sleeping, even though I do move around a fair amount - the waves seem restful.
My big disappointment was during the big Whittier Narrows earthquake - it hardly made any waves at all.
The only real problem has been with women who snore really, really loud in the wrong frequency range and in the wrong position - It can act as an amplifying echo chamber.I think some of the fancier versions might dampen that - but I haven't waited to find out.
One woman, afraid of snoring, brought a CPAP machine. Let me tell you, her snoring was nothing compared to the leaf blower sound of that diabolical machine. Fortunately she fairly quickly realized that and turned it off, so I got some pretty good sleep after that. There are times when the cure is much worse than the disease.
Personally, I think snoring is an extremely serious problem for many people, and I don't think our health care industry is giving it even 10% of the attention they should be giving it.
For the record: I have been reported to snore, but only a couple times in my entire lifetime. That was when lying flat on my back, but unless I am really totally physically exhausted, I can't fall asleep (or stay asleep) flat on my back - it's my waking up position.