If you want to watch a preview of what to expect in the testing I found this informative video (rather short compared to all the rest I have viewed) and what the cars that were previewed should have changed during the testing.
Too early, next week we will have tests and cars will have new stuff onboard, new wings are never seen yet.
The teams usually uses fake wings for example on presentations to keep their secrets till the last moment possible.
Yes that is why I said we should have a closer look of what to expect in this season's cars then they can evaluate during testing what needs to stay and what gets thrown out. Maybe those Ferrari wings since they copied Mercedes and they got fined for it.
This overview is more to the teams and what the general things on the cars would look like such as the color matching and sponsorships:
2023 F1 liveries ranked!https://www.youtube.com/watch?v=b_JWn5QEBPkSort of funny to see the marketing Alfa Romeo did during their welcome message by the drivers in a video posted on their media team's page.
Skip to 2:27 minutes if you want to just watch this part of the video.