Back in the 70s, you could rock up at the airport twenty minutes before your flight left, jump on with minimal hassle, and cruise along at 600mph to your destination. Now, you need to endure two hours of having your fingernail clippers confiscated so that you can fly at 500mph to save on fuel costs.
That seems to be the true advantage of rail travel. As it said on the loudspeaker in Berlin HBF last time I was there: "Please try to arrive on the platform at least five minutes before your train is scheduled to depart."
Sadly, I bet the way we'll end up equalizing this will be that somebody will eventually bomb a TGV and we'll have to start doing the two hour confiscate-your-kids'-apple-juice routine at the train station too.