This puts (even) more pressure on the current administration to get those vaccinations up, as lack of supply is not a real excuse anymore. Look for continued use of small windows to register, clinics/hospitals that are full when you do get on the system to register, etc. In other words, get ready for more fighting and headaches to get vaccinated.
My initial thoughts were far less negative: Very happy the US has made this donation. Very happy that those waiting for Moderna 2nd doses will get them. Pleased that China won’t be happy. Happy that Taiwanese will maybe see that the US is serious about backing Taiwan when needed.