I vote to deign this phenomenon 'Guitar Hero Syndrome', because, in the style of the GH-Guitar, its Rock Band cousin, and all of the gimmicky, pointless instruments to be thrown out with the Wii-remote (i.e. WiiWheel, this, and it will go on), it's like holding a small Matel-brand toy version of the real thing. Guitars, drums, steering-wheels...
...in this case, lightsabers.