Nice old Duc, hope it doesn't disassemble itself as quickly as my '70 Daytona!
No particular opinion to share here but a couple facts. Firstly, the Model S, Leaf, and Volt sold in nearly the same numbers in 2013. That's the first full year for the S, not sure if Leaf and Volt will continue to ramp like the S has. Now what the logic is to the formation of the various niches of cars (luxury vs. GT vs. sportscar vs. cheap sportscar vs. economy sedan, etc.) I couldn't say but there is an established luxury/GT sector that the S was designed to slot right into. The X of course will aim for the luxury "crossover"/SUV crowd. The Leaf and Volt are competing in a much more price-sensitive space, and one could ask whether they make sense if you aren't the early-adopter sort.
Secondly, the Panigale is $30k and it seems clear the Mission R is aimed directly at that market down to identical suspension components. BMW HP2 is similar. So I wouldn't say it's "priced far above comparable ICE bikes," though certainly Ducati and BMW are not making their core profits off these flagships. Zero has put themselves in a weird place of high-ish end sportbike price, but without competitive suspension and other quibbles that don't quite make them on par with the competition. Not sure how that's going to work out for them. I don't think Tesla would have much impact on the future of EV's if not for the 3rd gen ~$35k car with 100k's production volume. If no motorcycle maker forces the issue like Tesla has (and Zero and the others won't unless they push to mass volume) then I think it's right to say we wouldn't see anything but compliance bikes anytime soon. However I think the tech will improve fast enough that someone will have to make the jump before too many more years. If it's a major manufacturer then noone will have the jump on the competition that Tesla does, but it'll happen. It may be the cages that push the advancements that make e-bikes flourish.