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>In a hypothetical quantum internet we could encode and transmit two classical bits in every qubit, which effectively doubles your bandwidth.

Hmm... What exactly are you transmitting in such a scenario? What's the physical layer protocol? I.e. what are the wires made of and what flows through them?

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Photons, most of the current efforts for quantum entanglement pairs transmission is using good old lasers over optical fiber

Well, fair enough I suppose. Although a superficial reading would suggest this sort of technology is at least fifty years away from being deployable at opposite ends of a submarine cable to double the capacity without doubling the cable-laying. It reads like it's in the very early experimental stage, where they're barely demonstrating the plausibility, let alone the viability.

The question was why is quantum computing exciting, not when can we get it.

The "although" wasn't meant to invalidate it as an example, it was a link between two separate ideas.

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