Cycling with 'doped' bicycles: Fair or unfair?

Yesterday i ran in to a video in which it is suggested that Fabian Cancellara (winner of Tour of Flanders and Paris-Roubaix 2010) has supposedly won these two big cycling matches with the aid of a ‘doped’ bicycle.
It’s working is shown in this video but in short it is a little electro engine which is placed in the vertical tube (from the seat to the pedals) and it is supposed to give the cyclist an added power boost.
Now my question is this: Do you consider this to be unfair (to the other competitors and/or the audience) or is it just a new technology (like lighter, carbon frames or better, faster gear change mechanisms or ear phone communication with the team manager)?