Honestly, I cannot see us using anti-matter as an economical power source any time in the foreseeable future. It is true that we are able to create it, although it is difficult, but we need to input all of the energy to make it that we get from it, plus all of the energy lost due to inefficiencies of the process. Even if we could reduce the wasted energy to something negligible, and discovered a process which allowed fairly rapid creation of it, it still takes an enormous amount of energy to produce even a small amount; it would take 8.988*10^13 J or 24.97 million kilowatt hours, which is about the amount of chemical energy in 682115 gallons of gasoline, for one gram. Add into this the risk that it could be the most volatile explosive in existence if misused, and I cannot imagine that many companies would be willing to invest their time, money, and effort into making it practical.