Some of the comments here and on HaD.com suggested, that this project is pretty much useless, apart from its artistic value. I would like to say that this is not true, and that there is at least one copy of the Nyan Cat doing useful work out there. Behold:

This is a Nyan Cat connected to the door unlocking mechanism in MechArtLab in Zürich. Thanks to @Tillo for setting it up and letting me know!