I actually think that this is a bloody stupid idea...sorry...
Having a reader that can store books is cool. Having a device that constantly needs to connect to your home-Pc (or server) to display information is...abominable.
I would not mind this kind of feature for an ereader device, it might be cool for news and emails, but advertising it as a "main feature" seems rather comical to me.
Just imagine what kind of battery-life you can expect with WiFi running all the time???