Yes, the question is asked again, and I spend far too much of my life trying to answer this trivial question. If you've ever visited Wikipedia, you'll know what a mess this topic is. No-one agrees, and the list of baroque pop artists is frankly absurd. The media (music journalists) lazy usage of the term doesn't help!Witness the currently usage of 'freak-folk'. (btw freakfolk.com is safe in my possession :-))
So here's my latest thoughts on baroque pop:
Baroque pop is to pop music what progressive rock is to rock music.
It's a more complex form, likely to have more varied instrumentation and/or more ambitious song structures. Whilst the term baroque pop originated in 1960's music journalism during a fad for using a harpsichord in pop songs, the term as used by music journalists has come to mean something more ornate and complex than most pop music. In terms of modern artists, the two most often cited are the classically influenced ostentatious pop songs of Rufus Wainwright, and the complex arrangements of Sufjan Stevens' music with their non-standard time signatures, instrumentation and harmonic counterpoints.
Dear readers, do you have any thoughts on what baroque pop is? interested in your views. Perhaps we can sort out the Wikipedia entry one day!