This is quite nice, but the real killer version would be when the user has "virtual light" glasses (cf William Gibson, or - more physically - Prof. Steve Mann's

This is quite nice, but the real killer version would be when the user has "virtual light" glasses (cf William Gibson, or - more physically - Prof. Steve Mann's "EyeTap" wearable computing ideas). Then the colour-blind user would receive the benefit as long as they were wearing glasses (contrasted to looking through a phone when they needed to check a colour).