Any projections made last year about what Tesla might or might not do this year may no longer apply.
Tesla's R&D and manufacturing teams are likely stretched thin with continuing to ramp up Model 3 production, preparing for production of the semi & Model Y, working on designs for the pickup and Roadster 2.0, while continuing to make improvements in motor and battery packs.
Except for new vehicle launches, Tesla typically doesn't provide advance notice on any changes to models currently in production. When they have changes ready, they usually announce those changes the moment they are ready to change their manufacturing to include those changes. And because Tesla doesn't use the annual model year strategy, those changes can happen at any time, which always creates some frustration, disappointment and confusion for those owners purchasing vehicles before or after the change is introduced.
If you're waiting for major interior changes - they might happen later this year - and they might not - and if changes to the interior are a deal-breaker, then you could be waiting for a year or more before Tesla decides to make any major changes to the interior.
They believe they will have FSD "feature complete" by the end of this year - and if they are able to get approval to operate the vehicle, in at least some conditions, without driver monitoring - it's likely we'll see a major interior design change, de-emphasizing driving for the person in the "driver" seat, and instead providing better support for other functions, such as entertainment - since the vehicle will be driving itself.
While refreshing the interior would be nice to see - overall, our Tesla S and X are fantastic vehicles, and the interior design was a relatively minor portion of our purchase decision.