This was my exact thought as well. There's really no reason why sufficiently advanced computers couldn't eventually simulate anything and everything. I'm going to go a bit off-topic but there's a theory about the simulation in The Matrix operating from a different set of laws from the real world. Hence the reason why humans can actually work as human batteries very efficiently compared to other forms of energy.

So, there's the possibility that if we are in a simulation then the "real world" might be operating by a different set of laws and physics to what we know in here. If that's the case then I really don't know where the limit actually is or how we could tell from inside here.

Also nothing that says the computers running the simulation have to behave the same as ours, or even that the laws of physics in the simulating universe have to be the same as ours.

All they proved is that we currently aren't capable of simulating our universe. Congrats guys, great science thanks for the contribution to human knowledge.

Yeah it seems more than likely that we will be able to make a universe in a computer and plug ourselves in one day. Which for me proves that it's possible that we already live in a simulated universe. Not likely or unlikely, but not impossible.