If Video Killed the Radio Star, did Apple Kill the PC-world?

I don't know if you follow "Sing Off" on NBC, but I'm a total addict (don't tell me what happened last night, I'm watching on Hulu Plus later!).

This is my pick for who will win it all--Pentatonix!  I was struck by how futuristic their sound is and coupled with this song, "Video Killed the Radio Star" by the Buggles, it was eye-opening.  I mean, are any of these kids actually aware of what radio USED to be?  Or what music videos WERE to us in the 1980's and 90's?  For that matter, am I truly aware of what either of these mediums represented to people even 10 years older than me?

Actually, I do know.  You know too.  Remember computers?  I'm talking those truly huge Apple 2GS models that we used in elementary school to play Oregan Trail and Number Muchers.  I remember learning to program the "turtle" to make flowers on the screen as part of my DOS coding in computer class.  Could we have possibly imagined that those computers would become the hub of our society?

Are we prepared to consider that we're living on the cusp of a post-PC world?
Shocking, I know.  With the introduction of the IPad on January 27th, 2010, Steve Jobs and Apple began a revolution.  Now, there are 9 major alternatives to the IPad and more on the way.  Our Smartphones have become smarter, faster, and easier to use.  We're loosed from the weight and trauma of a laptop and many people aren't going back.

What does this revolution mean for marketing?
Frankly, I'm making it up like everyone else.  I've noticed more social media engagement, more blog readers, less hits on the website and more on our mobile site.  At this point, I've got data, but not a lot of theories as to where we go from here.  I do know that if I don't use social media to draw people back to my website, no one's going to see it.  I know that my website has to work without Flash, display nicely on small screen, and have plugins for Facebook, Twitter, and YouTube.

What trends and new avenues are you exploring in this post-PC world?