In 2014, ThereminHero performed at the Video Game Awards alongside Greig Stewart and Dave Gillies. The set combined the laser harp and the NESKeytar in a live performance of video game music.
The practical setup worked well because the NESKeytar runs in standalone mode off a battery pack — no tethered computer, no audio interface on a table somewhere. The laser harp handled melodic lines. The NESKeytar ran bass, chords, and rhythmic patterns through all available channels of the original NES audio chip, giving the performance a sound that would have been hard to replicate with off-the-shelf gear.
The full performance is on YouTube; links are on the Videos page. For technical background on either instrument — how the NESKeytar was built, how the laser harp works — the dedicated posts cover both in detail.