Learjet,
Many interesting and valid points there. And I think your right with about 90% of what you say. But I still believe this could work, given the right a/c.
Many routes, ie cork city centre to dublin city centre, although served by good roads / train, still takes 3-5 hours depending on traffic, time of day, day of week etc!
If you can do point to point in under an hour, surely there is a market there!?
With the right ticket pricing and aircraft, you could be onto a winner!?
my two cents...