For the benefit of others and for reference, here is the announcement: VST 2 coming to an end
That would be the logical consequence, seeing as the SDK will no longer be supported.
That is what I understand from the announcement, yes, for future Steinberg VSTs.
I would not be so worried about where the plugin files are located, VST3 hosts should allow a flexible arrangement so everyone can customize how the plugins appear within the host’s GUI.