Weapon Grouping is one of the new features coming to EVE Online, via the multi-staged release of the Quantum Rise expansion. Players spotted and have been giving updates on what they've seen on the Singularity test server, but now EVE dev CCP Ytterbium has posted a dev blog that explains this new feature in great detail, right down to screengrabs of Weapon Grouping in action.
If you've been waiting to hear more about this, you'll want to check out CCP Ytterbium's dev blog, 'Weapon Grouping', for his visual explanation of how you'll soon be able to consolidate your weapons into a single icon, and reload all of them at once. He also lays out the scenarios when you wouldn't want to take advantage of this feature, like when attacking multiple targets (although there's a solution to that built into the feature). Additionally, he's written a lengthy FAQ that should help dispel some of the confusion surrounding Weapon Grouping.