Folks let's clear some things up.
This is a IPS panel which means it will not have the nasty colorshift of TN panels. When you see a 24" for $300 it's a TN panel folks. You wouldn't want to do graphics on it.
DisplayPort- I'm a big fan of DP. It's license is free..it supports VGA/DVI/HDMI through adapters and it also supports an auxilliary channel (which is likely how Apple is running the audio or perhaps the video as well. Because of DP's design you can make the LCD thinner because it doesn't need to have a bulky TMDS receiver in the monitore. They call this Direct Drive I believe.http://www.displayport.org/
Futute DP technologies will include hooking up multiple monitors with one cable (and obviously multiple DP connectors) and the aux channel will get faster.
No you will NOT see an adapter that takes your DVI signal and easily convert it to DP. DP uses a Micro Packet system that is wholly different than TMDS signaling. I'm not saying you won't see an adapter but if you do it'll be expensive.
This monitor is typical Apple. It's affordable and flexible with top notch materials but it's expensive compared to the market in general. It's not expensive if you compare its peers (other IPS LED based monitors)
I'd love for someone to create a 3rd party hood for it. Glossy screens are not as bad as some people make them out to be. Pro graphics monitors have always needed hoods to reduce the effects of relections and the color of the walls and the graphic artists clothes (they usually wear black) from affecting the perception of color on screen.
The addition of speakers and isight to me make sense. I need to be able to run a laptop closed yet still have access to better speakers and iSight. I think you're going to see some really clean looking setups with this monitor and Macbooks.