from Stu Hackel of Sports Illustrated,

...Where the meeting fell short were on items that required a bit more foresight and more time, specifically the coaches' challenge concept. That one needed some serious study and probably a working plan for the managers to digest and critique. No real plan was presented this time, and because the group didn't lay the groundwork for that to take place in a future meeting, the challenge idea seems dead for now.

But it won't stay dead because TV replays will inevitably show what the on-ice officials can't see. That will only increase the demand for itI

It's too bad the GMs didn't have time to think this one though. They know the ever-increasing speed of the game has made officiating more difficult. As mentioned earlier this week, the challenge idea gained steam this season after linesmen missed an offside call that resulted in an Avalanche goal. But it has also gotten an airing because referees have been more vigilant on goaltender interference calls that wiped out goals, calls some GMs questioned, and because officials missed seeing pucks fly into the protective netting above the glass, which should kill the play.

Coincidentally, on both the evening after the GMs meeting and the night before it, a pair of incidents highlighted why some endorse instituting a coach's challenge.

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Use technology to get as many calls right, it is that simple!