Yes, all photographic slides fade eventually. How quickly depends of how much ultra-violet light the light source emits, the quantity of light in the beam, the temperature of the slide.
The ‘VISIO’ slides are exactly the same photographic film as all of out other products. The beam of the VISIO projector is very intense, there is no forced cooling of the slide and the light source is actually an array of five LEDs which illuminate the slide in an uneven fashion.
Our tests show that when the projector is used continuously for a full battery charge-worth (about three to four hours) the projector will get very hot and by the end there will be some visible fading of the slide. Whether this matters or not depends very much on the projection scenario. The blacks will degrade and become less solid, but may not be noticeable when projected onto a building, for example.