I did see some people with Macs, but most of the folk there were on plain-old-boring laptops running Windows or weird and wonderful flavours of Linux.
Out of the tecchie folk people I know, almost everyone either uses Windows or Linux. Either Windows is too "commercial and restrictive" for them, in which case Macs are too and they default to Linux, or they need specialist tools to run on their machine, in which case Windows wins. I know lots of folk that dual-boot Windows and Linux (or Linux and Windows depending on your pov), but very few who use macs seriously in the technical world.
Nearly EVERY presentation I watched on youtube, on ruby, python, go, about the cloud, by Google employees, by cloud companies, by web developers, etc. was on a mac. Did you know that a mac is unix? I guess i misunderstand what you mean when you say "technical world". I guess you mean dotnet.
To be on topic, i recall when the iPad was introduced, it was near unanimously greeted with "what, a huge iPhone? boring!", and I sometimes think people on this thread still feel that way. In any case, i'm indifferent to the iPad/iPhone as I am to WP7 or Windows in general. Still what i see folding before my eyes is miraculous. 3m ipads sold on the fisrt weekend.