The glowing apple is becoming ubiquitous. Is this indicative of the conference experience these days?

First a picture from RubyConf held earlier this month:

Reminded me of one of Jason‘s pics from Gnomedex this summer:

I wonder how the audience pics at DevConnections (.NET conference in vegas 2 weeks ago) compare.  Now, why didn’t I buy Apple stock when I first started noticing the geeks and their MBP or PBs back then?