DDD to hit 10 quid

You should try reading some of the reviews of the technology. They are less than flattering - "unconvincing", "creates a feeling of nausia" etc.

The comments about the sky and the methodology come from a DDD product review.

(and I have seen the technology)

"Chris Yewdall at DDD Group, which developed the $99 software, says it works by looking at the colors of the scene (for instance, blue color high in the frame is probably the sky) as well as how the scene changes with motion to figure out how to add the missing dimension.

The effect isn't completely believable in all scenes. Distant shots are sometimes treated as if they're close, giving the impression that you're looking into a doll house."

"If you look straight at the screen -- positioning your head more than a few degrees off center spoils the effect"