A Sony spokesperson just confirmed that the company won't be attending E3 2020, because it thinks that the event is not an ideal platform to unveil the PlayStation 5. This makes it two years in a row, as Sony was absent from E3 2019 as well. The company is likely to reveal the PlayStation 5 at one of its in-house events.
https://www.notebookcheck.net/PlayStation-skipping-E3-for-the-second-consecutive-year.450170.0.html
Now anyone think it is Apple and can skip big events... Ok, Sony can skip E3, they're big enough, but this is bad for small studios who use E3 to show their games to a broader audiences.