What I see happening here is that a lot of people are viewing the future purely through a mindset based in the present, and that a lot of people are missing the concept of progressing human thought and knowledge.
Think about it. With the exceptions of navigation by the stars, astrology, and a few other areas, humans have been primarily concerned with Earth and life on this planet. We've studied the biology behind nearly all life on the planet, and we've come to a conclusion that all life on Earth must exist as a plant or an animal. What I see happening in this thread is that everyone seems to be judging the universe from a standpoint of how things happen here on Earth. As far as we know, there are no energy beings that exist on Earth; however, in another galaxy or solar system, there may be just such an occurence, where beings exist in a much different way than beings on Earth.
Energy beings could exist, just exist in a way that is unknown to humans. Look at humanity one thousand years ago. People lived under the impression that the Earth was flat and that Earth was the center of the solar system, and in a creation out of dust. Look where we are now: we now know that Earth is a round object circling a sun with eight other planets, all of it in a massive universe with billions of other stars similar to ours. We now have the theory that humans actually evolved, not simply created out of dust. IMHO, to claim or imagine that humanity has reached the edge of our understanding of anything is truly misguided: we are still working on cures for cancer, AIDS, and the common cold, not to mention the countless more advances to be made.
Perhaps in the same way that many have grown to accept evolution, humanity hundreds or thousands of years later may grown to accept a new form of life.