Slow security is not inherent to air travel; it's something that was tacked on by politicians. It could easily be added to trains. (Or removed from planes, though I'm not holding my breath.)
Distance to the airport vs. train station depends on where you live. I'm actually closer to an airport than a train station, though I believe that for most people in cities it's the other way around.
You also need to throw cars in there. In the US, I fear the choice is usually car vs. plane not train vs. plane, as passenger rail just doesn't go enough places. Making trains faster would be great for places that already have trains (say, DC to Boston, which is currently doable by train but a bit slow), but wouldn't help with all the places not currently served. Now, if we were to actually ban or hugely tax planes for environmental reasons, that might spur the creation of more passenger rail. I don't see that happening in the US until South Florida goes underwater though.
Distance to the airport vs. train station depends on where you live. I'm actually closer to an airport than a train station, though I believe that for most people in cities it's the other way around.
You also need to throw cars in there. In the US, I fear the choice is usually car vs. plane not train vs. plane, as passenger rail just doesn't go enough places. Making trains faster would be great for places that already have trains (say, DC to Boston, which is currently doable by train but a bit slow), but wouldn't help with all the places not currently served. Now, if we were to actually ban or hugely tax planes for environmental reasons, that might spur the creation of more passenger rail. I don't see that happening in the US until South Florida goes underwater though.