I'll be just practical this time.
First of all every system you think is the REAL reality is just a mind game. It's created by your mind based by external collection of data (movies, books, magazines) and your imagination. In the Multiverse we are living (this concept is main stream now) all imaginable possibilities coexist in different parallel universes.
Therefore everything you said exists (in some Universe)
Related to holographic principle...the one with "we live in a hologram" it's not proved to be accurate, but it seems in a couple of years we will know. And it seems we are in a holographic universe, a projection of a 2D universe. It's strange but the theory is really strong.
Related to the how much I can understand from the Universe let's play a game: you encounter an ant. What can she say about you ? What are you? How do you move (for the ant you have the speed of an airplane and you are bigger than Godzilla). You eat mountains and drink rivers, you can disappear, you can fly, you can kill an entire ant city by one move. What's your life ? What's your God ? How about the oceans or the sky or the planets ? What are these to an ant ? What is your communication to an ant ? What's your purpose ? Etc....it 's long....
So, my point is: our species is very limited to discovering the universe, aliens, God, the meaning, etc because every biological being that dies has a limited knowledge.
So, to be more practical: all you said is possible and all can be a fairy tale. One from 1000 fairy tails. There is a point where all questions stops. They are irrelevant and the answers doesn't matter, actually.
I hope I'm coerent and not to rough.
Nice post.
Cheers.