It doesn't sound like much, but since Inter Milan is now stable again and unlikely to lose games, every point counts from now on. It is the same for any point Napoli lost in the past, but now the mind comes into the whole cluster and if Inter Milan doesn't get a period of weakness, Napoli knows that any point given away now can mean the loss of the Scudetto.
It is still interesting because there a couple of high priority games to come, but if the top teams don't do their homework and win the easier ones, the pressure for any of the most important games is a a multiple higher.
Napoli are not in the best shape now, and it does not look like they are changing for the better, they continue to lose points in every match with any opponents. Inter came to the end of the season much better prepared, I doubt they will allow anyone to displace them, in fact, Napoli are closest to them and if they do not start winning, Inter will increase the difference, and Napoli will have to play Milan and Bologna in the next matches, so they can lose points again.