I'm sad to see them go. Locally my only real choices for electronics are Best Buy and Circuit City. I loathe going to Best Buy - the service is crap, the stores are cluttered, and in general it's just a miserable shopping experience. And don't get me started on the Geek Squad...
I find that NewEgg is more than adequate for any sort of tech purchase. I guess that if people are going to be spending a lot on expensive tech equipment (and nearly all of it is expensive) then they'd probably like to see it in person first.
I concur. NewEgg gets 99.9% of all my tech-related purchases. It's too bad that Circuit City couldn't survive, but I've only been in my local store once in the past year (and IIRC, I didn't buy anything then and left empty-handed.)