What is 4D like ? How is it different?

[anagogy]

Q'uo says a lot that our we will no longer have "heavy chemical bodies" and instead have "electrical bodies" in 4D.

In a sense, ALL bodies are "electrical" as this Ra passage indicates:

19.20 Questioner: Then it would seem that there is a relationship between what we perceive as a physical phenomenon, say the electrical phenomenon, and the phenomenon of consciousness in that they, having stemmed from the One Creator, are practically identical but have different actions. Is this correct?

Ra: I am Ra. Again we oversimplify to answer your query.

The physical complex alone is created of many, many energy or electromagnetic fields interacting due to intelligent energy; the mental configurations or distortions of each complex further adding fields of electromagnetic energy and distorting the physical complex patterns of energy; the spiritual aspect serving as a further complexity of fields which is of itself perfect but which can be realized in many distorted and unintegrated ways by the mind and body complexes of energy fields.

Thus, instead of one, shall we say, magnet with one polarity you have in the body/mind/spirit complex one basic polarity expressed in what you would call violet-ray energy, the sum of the energy fields, but which is affected by thoughts of all kinds generated by the mind complex, by distortions of the body complex, and by the numerous relationships between the microcosm which is the entity and the macrocosm in many forms which you may represent by viewing the stars, as you call them, each with a contributing energy ray which enters the electromagnetic web of the entity due to its individual distortions.

All material is created by the dynamic tension of the electromagnetic field. It interesting to think about the fact that when you touch a "solid" object you are ultimately just perceiving the electromagnetic repulsion of subatomic particles. You aren't "actually" touching anything. It's just a field repelling your field.