Pretentious: Making or marked by an extravagant outward show; ostentatious. See Synonyms at showy.
Queen is an apt comparison too, imho. Suprised you'd take the Pink Floyd comparison like an insult. Every generation has its band that plays 15 minute, over-produced, over-written, theory driven songs outside of the main stream of music. Doesn't mean they aren't good, just that they aren't that original...genre-wise, not musical influence-wise.
If you're defining pretentious music as "15 minute, over produced, over-written, theory driven songs, outside the mainstream of music"
You could just as easily said "the 70's called, they want Frank Zappa back."
I don't think that's a fair comparison either.
I'd be interested in hearing what YOU consider original.