BBC News - Edible edifice: Building the offices of tomorrow: Designers talk of digital walls, which have sensors embedded so you can interact with them.
Or, if you want the professor's technical explanation, "dye sensitised solar cells with titanium oxide layers on a surface with light absorbing dye molecules adsorbed on surface which can generate electricity".
These walls will build up a profile of you and change your working environment accordingly.
This could mean the lighting around your desk dims slightly when you arrive, or a pre-determined microclimate is created for your meeting.