It is good news, but it doesn't mean that something bullish sign or big thing may come because of this. We must ensure whether the ATM is really instaled and used for wider and bigger transactions again. We still do not get any information or announcement officially by them. We also still do not know if the ATM will be used as main payment or only provide for any transaction using BTC. That is why we may not speculate too high because of this.
What do you mean by "coming from Elon"? The ATM is owned and installed by LibertyX ATM, which is not Elon's. LibertyX ATM is a separate company who also made a name by being the owner of the largest Bitcoin ATM network in the USA.
I think OP didn't mean that. He thinks about the probabilities if a big name as Elon Musk provides Bitcoin ATM there, it may increase the trust from many more people to come into Bitcoin, probably it will also encourage his workers and employees there to use and close to BTC. Ad if it really happens, of course, it will give some good impacts, but we can't ensure totally it will be high or not