Invisibility could be useful in many ways and our fantasy can suggest them, but I really think this is and will be always only a dream.
In fact, matter and the objects made with it are visible by our eyes because light has strong and various interactions with them; reflection of part of light (of its frequencies and intensity), transparency (NEVER total) and absorption of part of this light by the body.
What our eyes see is just the light variously affected by the objects hit by it or emitted by objects themselves.

To be invisible, a body would be totally transparent to solar light, without any absorption, diffraction and reflection.
It would be just like matter is for neutrinos that pass through the whole Earth without interactions; if our eyes were sensible to neutrinos we would see the light, I think, but nothing else around us.

To achieve such transparency from matter, we should change totally its usual physical and chemical properties and this is not possible, also because, using too much energy, in whatever form, we would disintegrate or seriously damage the objects

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