Unless we figure how to tunnel to the other side of the universe. Because quantum tunneling would allow us to move faster than light which is necessary to escape.
wow, this thread gets more and more interesting. I think the discovery of the holographic universe just broke all norms and worldviews of physics for the most of us.
Is there any issue here about fundamental stability? I'm struggling with how the universe can be at once expanding and some form of dimensionalized representation. Unless the other half of the relation is also in some sort of dynamic transition. Which might be true but suggest (perhaps as you do) there are things outside our perception that we can never perceive, not to mention measure or experience (ie travel too) because they are outside the space of our cognitive faculties. Or like you say, we are in a black hole and can't see out.
As our cosmos expands faster than speed of light, we can't ever escape this cosmos. Our light cone is similar to one that sits in a giant black hole.