Nintendo fans look forward to Nintendo Direct events more than anything else. They're the go-to presentation to learn new info, find out about upcoming titles, and see first-time reveals. Nintendo is quite fond of the Directs as well, but Nintendo's president isn't sure they'll be around forever.
Nintendo's president Shuntaro Furukawa was asked about Nintendo Direct events during a shareholder meeting, to which he said Directs are an especially effective means of conveying new game content and announcements. That said, the company could come up with something that's even more effective in the future. Nintendo has to constantly evolve their way of thinking, so something else could end up replacing Directs down the road.