Hmmm. I got the same phone call.
They wanted to congratulate me on my Model 3 reservation, and they would like to celebrate by giving me a test drive in a Model S or Model X to experience the Autopilot feature.
Their evil scheme may be to entice me to embrace instant gratification and pick up a new (or maybe a CPO) Tesla now, rather than wait approximately a year before my Model 3 reservation supposedly comes due. It isn't such a bad idea.
There are nearly half a million of us (!) Model 3 reservation holders counting the days when we expect to get a message to Configure Your Model 3, even though that we will have to wait perhaps a year. We know (and Tesla knows) that there are a number of us who won't wait that long. So rather than play "catch and release" with, say, a quarter million reservation holders, Tesla is willing to play "a bird in the hand" with those rezzie holders, offering to sell them a Model S/X now, and qualify for that $7,500 Federal Tax Rebate now before it goes away.
Many of us reservation holders will hang on 'til the very end. Many will drop out. And at least Tesla is reminding us of a third option --- ending the game early and walking, er, driving away with something instead of nothing.
-- Ardie
"Maybe I'll just go down there for a look. What harm could it do?"