I'm hoping to reverse a couple of choices made by the Android Dev Team concerning image resources. The first is the suggestion that XHDPI is good enough for most use cases so XXHDPI resources aren't necessary. Second, the newly-introduced resource name for 4k / Ultra HD screens: XXXHDPI.
I'll start with the easy one: XXXHDPI resolution should be called UHDPI.
Within a few years, there's a good chance MDPI and HDPI will be deprecated, just as LDPI is today. This will leave us with XHDPI, XXHDPI, and XXXHDPI as the standard identities for Android resources. X, XX, and XXX. That's silly.