Details are pretty scant at this time, all we know is that HD Radio will be offered in "select audio systems" in the "near future." Which means that it's not standard equipment and it won't be available in every system across Scion's three model lines.
Here's the standard corporate blah-blah from Toyota (iBiquity's isn't even worth quoting):
He's right, Scion users are indeed in tune with audio technology, they're also notoriously young. Which isn't an insignificant development, as terrestrial radio is trying desperately to re-engage that youth audience.
"Since Scion customers are in tune with audio technology, it makes sense that we enhance our already outstanding audio offerings for them," said Jason Adang, Accessory Audio and Electronics Planning Manager, Toyota Motor Sales, U.S.A., Inc. "Digital HD Radio technology is ideal for our youthful, tech-savvy customers who will enjoy the wide range of content available on HD Radio channels."
The real question is whether this opens the door for HD Radio inclusion in more Toyota vehicles.