What if a video game looked just as real as a flesh and blood game?
Steve Evans in California talks to Jen-Hsun Huang founder and Chief Executive of Nvidia, arguably the world leader in creating software and graphics for video and finds out where computer graphics could go.
By contrast John Seely Brown, a big thinker on business and former Chief Scientist of the Xerox Corporation, tells Steve that you can't necessarily improve companies by assuming that fancy technology is the answer.
And we hear Matthew Klipstein's story. He sold his digital archive of photographs to Microsoft ten years ago then eight weeks later suffered a dreadful accident which partly paralysed him. He set up a new company, NeuroRepair Incorporated, to find a cure for his own condition.