I can't agree. "Uni" does mean "one," and "totality of existence," but it doesn't mean "only." The Universe only means that which we have the ability to observe; or the contents within our Universe. The content within other Universes may not be observable to us outside of its interactions with the fields contained within our own.

With the verification of the Higgs Boson particle; we now know that our Universe has a finite lifespan. As time reaches infinity the Universe will no longer be able to bond atoms together, and then when all the atoms have been broken down, the subatomic particles will fall apart. Everything that once existed will no longer exist in it's current observable state. The result will be a new big bang and a new Universe formed with new matter. Quantum tunneling will cause propagation at various central points all moving relatively together. Time will not exist as it's a non-linear function with no observers moving at un-relative speeds.

The matter within the Universe will become mass-less; the energy is converted to velocity (galaxies are speeding up) and the physical laws of our universe will become null. Without the interaction of the Higgs Field, all atoms will burst into the subatomic particles that compose them.