I'd be interested to see what happens if a conference purposefully doesn't have WiFi. Would people talk to each other, or just not show up? Sitting in an audience of a couple of thousand, everyone staring at their screen (that 'Cannot find server' page is enthralling)... it does make one despair for human society, sometimes.

On the other hand, when there's a bad speaker, we'd be limited to Solitaire; and unable to Google further resources, or diversions, or complain about it on HN.