The "Frasier" ending-what was it?

I hadn't seen the show in a while-still pretty good but I have a question about the ending.

We saw "Frasier" in first class talking to a very attractive woman and they are landing in Chicago. The woman wishes him "good luck". Now the story was that he was leaving Seattle to do a radio show in San Francisco, so what was he doing in Chicago?

Was he going to see the blonde woman (his latest romance) who had left Seattle for a job in Chicago?

Was he headed back to Boston to possibly try to patch things up with Lilith and be near his son?

-OR-

Was it a "Newhart" type ending where the last 11 years had not actually happened, we see him on his way to Seattle from Boston?

Why would someone eat tossed salad and scrambled eggs, or is that a sexual metaphor?

Kindof a disappointment I thought

And there's rumor that it's supposed to be the beginning of yet ANOTHER spinoff.

Was the "registered Nurse" who delivered Niles and Daffney's baby his actual wife? LOTS of work done there.

I only know what I read in the paper this morning.

it will not be situated in Chicago. Mark my words, DU.

Frasier in Chicago. What a nightmare. If that happens, our fair city will be tainted forever. With no hope of recovery.

DIT-ka!

but it jumped the shark about the time Niles and Daphne got together . . . the past five years have been generally unfunny, as was the finale (though it did have a few moments) . . . they shoulda quit a long time ago . . . fortunately, we can still catch the early, funny shows in syndication . ..