Worlds thinnest display using a soap bubble

Non-blogspam source: <a href="http://www.theverge.com/2012/7/2/3131606/thin-soap-bubble-display" rel="nofollow">http://www.theverge.com/2012/7/2/3131606/thin-soap-bubble-di...</a>

um, how is colour possible?

I wonder if they can get the resolution high enough to do proper interference patterns. It would be a cool way to do digital holography.