I am not sure this will be a success

I don't see much of a market for this. Most people either want their laptops to be their primary machines and will take something quite powerful, or have a powerful desktop at home already and will just buy a cheap netbook for on the go surfing and media playing.

The only market I see for this are people who want a very cheap laptop that has a big enough screen and keyboard to be used as a primary machine, but who can't (or won't) buy a "full" desktop replacement laptop. In short they would probably compete against the 12 inch machines with an atom processor and the cheaper (sub $500 / 400€) 15 inch budget notebooks with Celerons.

The only chance I see is if they manage to compress the prices to the point where a 14 or 15 inch laptop cost as much as a Netbook (like $399 / 350€ max), at which point they would displace the budget laptops.