Currently, technologies are being developed to create an industrial process for mass production of bio-bricks. There only drawback is they release ammonia in the process. Such ammonia release needs to be trapped, else it can endanger underground water.
The technology can be effectively used for creating bricks from sand dunes using waste like urine from swine industry and egg shells from poultry industry (for calcium).
Other future promising technologies are:
3D printing - to create three dimensional prototype models at home rather than in industries. Filabot by Rocknail Specialities is a popular 3D machine with plastic composites.
Sapphire fibre (to replace optical fibre) - Sapphire is a cheap and widely available material. It can be used for high energy applications. Clemson.edu is aggressively pursuing research on it.
Carbon nanotubes - Buckyballs or buckypapers as they are often called are more flexible than rubber and stronger than steel. Currently they cost around $60 per kg. University in England is developing an electrochemical process for industrial scale production of around 600 kg of nanotubes at $10/kg. Once this technology develops, lighter planes trucks cars elevators can be produced cheaply.
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