What a weird thing to say, of course energy isn’t obsolete. However, all modern forms of producing significant energy are being made obsolete by the Rossi Energy Catalyzer or e-cat (I prefer just to call it a rossi).
Oil is obsolete! Oil is used for three things: energy, plastics and lubrication. However, oil is primarily used for transportation power. The rossi will completely replace oil for transportation. I expect that this process will not begin for another 10 years. (It takes a while to implement a new techology.) However, I suspect that the process will be nearly complete in 20 year. At that point, oil, as a form of energy, will be seen as obsolete.
Natural gas is obsolete! Natural gas is mostly used for home and industrial heat. Home heat will be the first thing to transfer to the rossi. The rossi directly generates heat. This will be an easy conversion. Initially I expect we will be able to buy a rossi boiler — a device that produces very hot water. Some homes are heated with water/steam in boiler systems already. However technology already exists industrially to provide instant hot water from a boiler, and to convert forced air furnaces to use a boiler core. I am hoping that five years from now I will be able to replace my furnace and hot water with a rossi.
The electrical grid is obsolete! It will take a little engineering, but no magic, to produce a home-use rossi that provides all of the energy necessary to run your house. I expect that a single unit will provide home heat, hot water and electricity. Industrial heating and electricity will be just as easy to produce. After all, the first rossi installation will be a 1 megawatt power generator.