Many famous guitarists have a signature sound that's constructed using a well-known set of equipment. Effects and amplifiers can now be efficiently simulated using software, so there's nothing stopping somebody from bringing out an effects box which simply has a menu of guitarists' setups to duplicate -- so you can push the "Jimi" or "Brian" button, and get an appropriate sound (provided your playing's up to scratch).
It looks like DigiTech have implemented this idea: they do Jimi Hendrix and Brian May pedals.
Piet Delport pointed out that Vox similarly offer a Brian May Special amplifier, which attempts to simulate some of Brian May's setup (albeit without the delay and chorus feeds).