You could buy a brand new Xbox Series X for $499 back in 2020. Today that exact same console costs $800, and it's six years old. Consoles are supposed to get cheaper as they get older. The next Xbox could cost $1,800. And one of the companies pushing that price up is Microsoft. Fortune reports Microsoft is aiming its next console, Project Helix, at the 2028 holidays. Internal estimates put it somewhere between $1,200 and $1,800 unless Microsoft eats part of the cost. Almost all of that comes…