The New Earth is a state of consciousness, a change in frequency that suppressed the old earth. Those who rise to match the higher frequencies will live in the new earth. Those who fail to match the frequency will remain with the old earth. The two of them exist together only in different dimensions.
Those who have shifted feel that everything is changing as if living in High Definition. It's hard to explain unless you are there too. But you can feel it! You can still get involved if you want a lower dimensional existence, but you feel the density & blockage emitted there & you know that it is no longer resonating with you.
You become clearer where your energy flows & what you allow into your sphere, you can still choose low energy if you want, but it pulls you out of alignment super fast & feels beautiful, so, you do whatever it takes to back into alignment. This includes engaging with other people's energies that are out of tune, you feel immediately discomfort.