I see a lot of comments wondering about this. To clarify, RTFA: "...provide fingerprints upon re-entry."
Translation: each time you enter the country, instead of waiting on the 2-minute line and just wave your document(s), you'll wait on the 30-to-60-minute line and have your prints and photo taken. This is not about availability of the data (that is not new), it's about extra formal procedures at the borders.
Furthermore, the arguments about document forgery mentioned in the linked article also apply to US passports. After all, they are also issued by a US authority, like green cards. So, clearly that is the next logical step, except it may be a bit tougher to pass (simple: US citizens vote, non-citizens don't). But the new rules for permanent resident aliens should be a good move to prepare the public.
As to how useful all this data collection is: as someone currently stuck waiting for a visa because the new USCIS database system is not functioning properly, without a timeframe for fixing it, I have some doubts. At least I was formally warned about the presence of bugs in the system and potential indefinite delays, but I chose to be (too) optimistic -- so I cannot really blame USCIS for having to reschedule my trip.