As for Chrome OS I am going to dive completely into the cloud experience over the next 2 weeks. A post my thoughts on this site.
To give a little background, I am a Unix Administrator and Mac user. I have an iPhone and iPad and very much think that is the wave of the future. Having said that I have family that is constantly looking for computers etc. I am hitting this with an open mind and seeing what value this notebook can provide. I have been around all sorts of computers for many years.
For my first impressions:
Given the lack of apps in the app store I don't see this yet as being useful for IT folks. I do, however, see this as being very useful for many of the PC users. There is some transition time for some folks but for the most part they can accomplish everything necessary with this device. For a device to travel with, this is a very suitable notebook. I do question why this isn't a tablet. I see the use case with this device much like that of my iPad. Yet my iPad has a better battery life (not by much). Plus I can put media content on it and not rely on network for delivery. I am excited to see what comes over the next couple years to make this a solid competitor.