The problems here being:

1) The vehicle literally does not exist, it's a computer rendering, and if it doesn't exist as a working prototype in 2021, then it sure as hell is not starting passenger operations in 2028.

2) If they build it, especially as a battery-powered model, then it will almost certainly not have the payload for cars or bikes - much like the little hydrofoil that used to run a passenger service between the south of Sakhalin and the northern tip of Japan.

3) Who the hell is going to pay a premium to quickly fly as a passenger between two coastal ports and then have to spend 3x the flight time in border queues on either side of the channel?

People always post the photo of the Lun above - but that was a prototype of a warplane, a fast missile platform designed to kill US aircraft carriers by coming in under the radar, launching a barrage of cruise missiles from a standoff distance of the carrier's battlegroup, and GTFOing before the enemy CAP notices. Even for the Soviet Union at the height of the Cold War, it turned out to be economically unviable - unlike the Orlyonok, a later heavy cargo model designed as a fast landing craft, which actually was in service with the Soviet Navy for a minute.



And then of course it turned out that there was no real use for them.

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I live on one side of (what used to be) a very busy ferry route, Tallinn to Helsinki, millions of passengers a year, hourly departures by multiple operators. Every attempt to run anything other than a massive car-and-truck ferry has failed miserably, including helicopters, passenger-only hydrofoils, and fast CATs that took vehicles. If you can't stuff your hold full of lorries, you can't make the economics work.