Sounds good because it seems like it explains what our reality is, but it really doesn't. It just pushes the fundamental problem up X simulations into the supposed "real reality". It also assumes that simply simulating a universe would generate consciouss beings which nobody knows the answer to, but my guess is that it would not.
These particle physics are still needed. We generally assume the dream you have at night does not take place within a whole universe, yet it is still governt by some rules - for example you may experience gravity within your dream and understand that to move around when actually there isn't any gravity but it seems like it is.
It's equally important to understand and study the rules of this waking dream you are having while reading, not because there are actually atoms out there but because it behaves like there are. You can do physics without metaphysics, altough the two usually get entangled somewhat.
