RE: empty space,
i agree that there is no such thing as a complete, empty space vacuum. at least in theory. in theory, there would still be activity, such as the occasional neutrino whizzing by, subatomic particles popping in and out of existence due to quantum effects, and maybe / maybe not dark matter.
and let's be clear on that- dark matter is a hypothesis made to specifically explain why galaxies hang together... based on the fact that there is insufficient black hole and star mass to do so on their own. but dark matter in deep space? still very much an unknown AFAIK. or maybe i'm wrong about that last part-- not totally sure.
but even if you could isolate units of space that temporarily contained no passing guest particles of any kind, the space would still contain foreign matter, namely space itself. the reason that i say that is due to the theory that the universe, as it expands its mass, also expands its space. i.e., at the moment just before the big bang, our universe had no dimensions of space, and those dimensions were only created as business partners with matter itself. which leads to another interesting subject-- that our universe is clearly positively-biased. i.e., if positive matter and negative matter had completely equal weight across the board in the mathematical sense, then all matter would have cancelled itself out in our model, and we would not be here today. instead, for reasons we don't understand, a small fraction of positive matter did not get cancelled out by corresponding negative matter, and that small remnant is all the stuff that our planets, stars, galaxies and even dark matter is built of. that, and nothing more. nevermore!
RE: black holes are full of "nothing,"
strongly disagree. black holes by their very nature are filled with enormous amounts of material that they've absorbed. in fact, if matter had been spread completely evenly by the so-called big bang, then a mega-meta-super-black hole might have been formed as a result, and all matter (and space) sucked back into it... and therefore no universe, and therefore no PS3 games.
on a side note, black holes contain so MUCH loose mass that stephen hawking's greatest theory AFAIK is that of "hawking radiation"-- that black holes emit a radioactivity of particles over time, slowly spewing the contents of their enormous guts back in to space time as we know it. i.e., the most greedy and cutthroat rockefellers of this universe turn in to the biggest charitable donors. exhibit A in our world? see bill gates.