What is a hipster? Look at this fucking hipster...

Another hipster statement.
I don't even particularly like this Lightspeed guy. But your argument irks me because it's predictable and short-sighted.

You can't compare music from the past to the music of today, just to prop up a tired argument about how music was once more significant and valuable than it is now because of some completely static definition of "skill".

Firstly, because as well as being "revolutionary", cultural vessels such as music can also become obsolete and banal. Add RATM on facebook and see for yourself.

Secondly, because the values assigned to music as a whole have changed. We don't just listen to the arrangement and revere the skill of the musicians. We buy the record, watch the video, become part of a movement or culture, we invest much more in music than points for "skill". That is why Ludwig will forever be "that bloke off A Clockwork Orange".

Skill takes on many forms, and whether you like it or not, the definition changes, constantly, along with our culture. Music, and most other aspects of life, would be pretty awful if they didn't.

Wrong. Take a look at young aspiring musicians, how many of them will be buying the sheet music to Boyonce, Rhianna & GAGA?
ZERO
They are all still going back to 60s, 70s and 80s musical compositions to learn from.
Hell, the names mentioned will still be looking to older standards to sample for their next 'hits'.
I think the overwheliming majority still understand a good tune. Sadly the it is the marketing depts, money and powers of the majors that appear to have changed what people like. The good stuff doesn't really see the light of day outside of late night specialist shows. Great music is still being made but unless you have the time and the knowledge to seek it, you're stuck with Walsh, Cowel, Cole and Dani.

To say you can't compare older musical forms with those of today is also wrong imo. Listening to stuff of the seventies (a time of deep political strife) gives me far more to cling onto than anything Lil Wayne 'drops'.