I was in Cleveland-Lyndhurst SC earlier this week and there is a rumor that we may see a Model 3 on display as early as next month! This would be great! We have a reservation (waiting for SR), but haven't been able to sit inside a Model 3 yet. They do have some Model 3 cars in their parking lot, but they wouldn't let anyone inside.
Model 3 is now on display in Cleveland! I stopped at the showroom earlier today. No test drives yet - that should be coming around August.
FYI, Model 3 test drives are ongoing at the Cleveland-Lyndhurst SC. I've got mine scheduled for next week! They even have a choice of performance and non-performance configurations. Nice!