Do we live in a computer simulation?

It's hard to say wether or not we are real or not, there is a 50/50 chance that we live in a computer simulation. Technology advances more and more overtime; taking the Xbox discussion from class, as time goes on, the simulations on the Xbox gets better and better. The visuals and graphics become more realistic with every new Xbox. So we can feel like everything is real, when it's really not. But I believe that this universe we live in is real. The idea of something bigger and greater is controlling our every move just doesn't seem possible. Even if we were a simulation, what would be the point of it to the greater unknown controlling us? Maybe we deny this theory is because the fact that we don't have control of our own lives, seems scary, so we don't want to believe it.