Sorry 2020, this year bad. I think it will release 2021.
It says GT7 builds on 22 years of experience. This year aka 2020 is the 22nd year. So I think it is a launch title. Just think how much GTS has evolved after the launch. Got so much update. GT7 can be the same, they can add a lot of stuff thanks to the OTA updates.
To be fair, though, none of Sony's first party games shown in the event have release windows yet except for Spidey Miles. They're still being cautious on divulging release windows this early.Talking about the upcoming Porsche VGT I'd like to make a comparison:
The Bugatti VGT was teased in Aug. 2015 and unveiled in Sept. 2015.
The beta test of GT Sport started in Oct. 2017, one week before it was finally available.
So I won't have a high expectation about the release date of GT7. Maybe holiday 2020 (but if so they should have told us), maybe 2021, maybe 2023 or even worse. I'll simply wait silently.