Here's the thing - TDL is much more "competitive" with WDW or DL than most people really realize. It's not that much more expensive.
And sure, overseas travel isn't for everyone, but Tokyo is about as smooth as overseas travel gets.
It really is a lovely country. I came away from a week in Tokyo with not only a greater respect for Japan as a country, but a very positive overall impression of its people. I had a good overall impression of Japan before going, but I came away with a better one. Sure, like every country it has its issues (as we do in the states and as everywhere does), but overall I found it safe, courteous, clean, culturally fascinating, and welcoming. Some of the things that Americans might find messed up (in our view) about Japanese society (like the very long hours work culture), don't really apply to visitors anyway.
In a way, I'm hesitant to talk it up too much, partly because I don't want to overhype it, but mostly because I'd like to keep it a bit of a secret...
Of course YMMV. I respect BasiltheBatLord's view. Sounds like he liked it, but wasn't as impressed with it (or Tokyo) as I was. Who knows how any individual person will react. After all, I wasn't that impressed with DL, and most people are. To each his own!