Cold Soldering - utilizing nano-sized liquid metal particles to solder has several distinct advantages. One is that it requires no heat. Two is that the user can be significantly more precise in its application, down to mere nanometers if required.
Metal Casting - the ability to create metal castings without the need to heat the metal alloy will significantly change how metalworking is done today. In addition to being more cost effective, this also opens up many more uses of metal casting.
Jewelry and Crafts - the entire industry of jewelry and crafts will be completely changed with the ability to create metal (silver, gold, alloys) through simple processes requiring no heat.