In this story, mankind has abandoned its vast irregular cities and ascended the heavens, taking with it industries and farms, allowing the earth to regenerate the steril soil caused by urban sprawl. The new eco cities and vehicles float above an artificial sea of plasma that makes it look like a boreal ocean that seems to come from fantasy tales.
Not sure what you mean by 'Lateral Line', but given the type of 'electrosense' is a bit too weak to work outside of the ocean but it could work in tandem with the plasma and/or aid in understanding emotional feedbacks giving a very quasi mind reading ability of others. At least as far as knowing between which of 2 choices one would make.
The vehicles can only fly over the area around cities, to reach other cities, the two cities need to cross each other so that their bright oceans come in contact. Some particular structures can also create bridges.
These two senses have evolved to serve the surface, the "lateral line" makes them perceive minimal movements, they would perceive their presence for several meters. Yes, you got it right, that sense also connects them as a kind of collective consciousness, but only between them, they can't understand the minds of normal humans.
The "electric sense" makes them sensitive to electricity in the air and objects, because of this, they feel uncomfortable and tingling in the face when inhabiting cities like ours, with bombardment of radio and wifi signals. Their cities use other technological methods that do not involve radio signals or electricity. They use many cable and wire connections. The bright ocean causes them tingling, but a comfortable tingling.
Glad you are interested in my stories! Sorry if there is any anomaly in English, I used google translator.
And hmm would love to use such an idea in a story of my own but I can't draw only ask others for commissions XD.