The large majority of VMware customers have already migrated off to newer versions of VMware products that no longer rely on Flash and this announcement will be a no-op for them. This will also impact usage of VMware products that still uses Flash such as older versions of vSphere with the vSphere Flash Web Client or vCloud Director with their Flash-based Tenant UI as an example.
Hopefully this news should not come as a surprise to anyone but at the end of this year (December 31, 2020), Adobe and all mainstream web browsers will remove Flash functionality preventing users from interacting with any Flash-based web applications.