I usually am one of the first to buy any new radio gizmo, but I have yet to find an HD radio displayed in any store that actually works. Supports my sane reasoning of keeping the cash in my pocket. If you could actually get the HD signal inside a building, that is.
Now if someone would invent HD Music On Hold, I would buy that - sight unseen. That would really be helpful during those long waits to the phone company. You could have free music to your stereo, for 30 minutes at a time. And you could also hear the telemarketers butcher the English language with great clarity. Bonus.