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Will.i.am shows off his latest art installation which will involve digital music and analogue gesture control. David Reid travels to Cannes to see an immersive film screening where 2,500 industry professionals attending, all wear custom �emotion-sensing� wristbands that measure the audiences reaction and their data is visualised in a 3D hologram projection which surrounds the physical cinema screen. And LJ Rich is in Sweden at an art auction with a difference - the auction visitors are each individually hooked up to biometric sensors which measure their state of arousal and once everyone�s data is gathered, the piece of art on auction will be given to the winner with most of a reaction.