Was it PhotoSynth ?
https://www.ted.com/talks/blaise_aguera_y_arcas_how_photosyn...
https://www.ted.com/talks/blaise_aguera_y_arcas_how_photosyn...
I highly doubt that demo was JS / could run in multiple browsers without some proprietary runtime.
[0] https://web.archive.org/web/20191231213153/http://phototour....