I haven't done any reseach on it, but my question is will it affect our analog boomboxes?

I'm no expert, but, as far as I know - unlike with TV - the FCC currently has no plans to require that radio transmissions be digital only. Maybe in the future...

See the Wiki article for all the gory details of HD radio.

P.S. I don't know about you, but I've got a few boomers with TV audio bands (not to mention, a few with actual TV's). That reception will be static come February.