Nintendo weren't discussing their next games-dedicated hardware, the mysterious NX, in detail publically at E3 in June, but they did reportedly meet with third party developers and publishers to discuss the suspected successor to the Wii U.
According to Fortune "the reception, say insiders, was positive" in their interview with legendary game designer Shigeru Miyamoto about the failings of the Wii U, Nintendo's follow-up to the hugely successful Wii console.
Keeping third parties in the loop is standard practice ahead of the release of a new console but one of the reasons behind the Wii U's disappointing sales was its virtually non-existent third party support. So for Nintendo, winning them back for their new device would be an important first step back toward success.
It's not yet known exactly what the NX is – but recent comments have suggested that it is likely a successor to the Wii U home console, and possibly the Nintendo 3DS handheld as well.
Nintendo president Satoru Iwata revealed the codename of their next device in March during a press conference at which Nintendo also announced their intention to develop mobile games using their key IPs for the first time.
At that event Iwata stated the company wouldn't announce any more details about the NX until 2016, a message reiterated during their E3 digital event. No release window for the console has been revealed.