I have the $249 ARM Chromebook from Samsung. It is great if your workflow involves developing remotely over an SSH connection. I also have the Nexus 10, so I couldn't help but to notice the difference in screen quality when going between them. I don't know that I need a Core i5, in fact, I would probably prefer to keep the ARM processor for battery life/weight/etc, but a high resolution screen and backlit keyboard are the things I really feel like my current Chromebook is missing. That said, I don't think they're compelling enough for me to spend that kind of money.