In general you're right to mistrust the oft-repeated headline. But this is actually a big deal. Voyager I really is exploring a new part of space for the first time.

It's also worth noting that Voyager I entered interstellar space well over a year ago, but that only now have we been able to confirm that fact. So if it seems like this has been repeated a lot lately, it's because the scientists have been sifting this data for a long time before they could be sure. (Again, this is uncharted territory for the human race.)