What do they all have in common? They all have in common that NONE OF THEM EXIST. Yes, that's right. These projects get announced as if they are factual existing devices, with announcements using verb tenses suggesting they are currently in production and available. But then looking for details we find that no one is sure what the form of the device will be, or what parts will be involved because they are not developed products. That is a deceptive practice. And you know what, people who resort to such deceptive practices aren't the sorts of persons that can manage to deliver the goods.
edit: wow, downvotes, that is awesome. When downvoting, please also respond with a web page where I can purchase OLPC for $100, the India PC for $10, or this one for $25. Thanks.