Amazon's Kindle e-book reader - is the user ready for another device?

Amazon has unveiled a new e-book reader.. think of this as a $400 devices that enables you to read e-books... ouch! With the trend for device convergence finally gathering momentum is Joe consumer ready to adopt a $400 book reader? I'd argue that instead why not simply grab a funky Linux Tablet PC that will do the same job and much, much more. Do you want one? Cool features include the wireless connectivity and the non-glare "electronic paper". It's only 10 ounces too!