I believe that Lewis's The Last Battle is one of the finest portrayals of what life could be like as we enter the New Earth. It is imaginative, and not all can be proven biblically, but this much can—we will live as embodied human beings on a physical earth, eating and drinking and serving and laughing and loving and worshipping God forever. Not as disembodied spirits, but as resurrected people. Not floating on clouds, but walking a real and redeemed earth in real and redeemed bodies, in community with our Savior, the King of Kings, and each other.