Totally agree. I didn't find out until it was too late. I should have done more research, but I ASSumed a flagship would have aptX HD, just like LGs. I'm OK, because I can still connect via LDAC with the Radsone, but for something like the B&W PX, ATH-DSR9BT, aptX HD is fabulous.
From what I understand, it's already in the hardware, so Samsung can enable it if they want. I really don't think "Samsung HD" is going to take off, nor would any non-Samsung product want to claim they support "Samsung HD". Sony's LDAC is generic, so it doesn't "brand" the codec, which makes it attractive for others to use, plus the specs on LDAC are marvelous.
Samsung is just WAY over-branded.