Ha! That is the nature of this hobby.
However, If this upgrade box is going to cost $350, you could probably find a receiver for similar cost or a little more that adds some other useful function that isn't just TV specific.
I don't see me getting any of these future upgrades for the TV anytime soon. My next upgrade will likely be a true 2160p OLED TV. That won't happen anytime soon.
This could go on and on, but why buy the high end TV then, with a low grade audio system. Forget it,,,,