The only sillier idea I've ever seen are those extremely peculiar busses that somebody sold to the airport design committee at Washington Dulles....you know, the ones that go up and down and cross the active taxiways?
That'll be the Mobile Lounges and PlaneMates you're thinking of... They are very peculiar, but I kinda prefer them (from an SLF perspective!) to airbridges or airstairs. Different to the norm and all that...