Well... technically speaking it's no different than the Apple conference, which wasn't broadcast on TV but was streamable via the interwebs.It's possible, but i think it would be a lot more likely if the show was broadcast live. This won't be like Glastonbury or the Apple conference - it's not live, and it's nowhere near as big or as well known.
It makes sense as a platform to perform/promote the single, but not to launch it to the world. I think it would make more sense to do that in the days beforehand.
iHeart is available to stream live