Maybe they will do away with seats altogether-- passengers will be able to rent folding chairs that they can take onboard and place it on the grooves. These chairs will come with seat belts as per safety regulations and only these will fit in the precut grooves. Imagine the savings and the extra rental revenue!!!( extra penalty for passengers who do not bring the seats off the plane)-- the ticket to CDG will be 10GBP--seat rental will be 85GBP!!Ryanair--are you listening?-- I have more ideas where that came from!