I am pretty sure that Frontier isn't referring to car collectors when they say fleet though. There are several definitions of the term and I'd say we go with the one that is most likely.
That's a fleet:
And that's a fleet as well:
But they aren't the same thing. Why does a German guy always need to explain your language (even though he admittedly sucks at it)?
I think it's just as likely it's a car trailer as it is an aircraft carrier. From what we see in the video, for starters it doesn't look like a combat ship. Even if it is, we see several what look like large landing pads. Those aircraft carriers spit out tiny little short range fighters, not the cruisers and destroyers surrounding them. That's what the fleet ships will be doing though.
I dunno if they'll have fsd range like mega ships, because that would defeat the purpose of megaships. I'm pretty sure it's going to be long though. You're not gonna get a bunch of people to sit through a bunch of jumps. They'd just want to use their own ships. Uses for this thing that come to mind are home-base for a squadron, extra mobility, and area denial/control.
Right now, it's luck if a squadron has a decent station to keep their ships at. Between outfitting, engineering, and just the various dispersed nature of everything then combined with long soul-crushing travel gameplay, it's unlikely people will have their ships in one spot. Whenever they want to do anything with them it usually means travel. Trying to get a decent station to get around that means BGS and BGS can be good, decent, or completely suck. I think priority number 1 for these ships is to be Squadron HQ. Their outfitting might be a case of "as good as you make it".
Secondly, I think these ships will be mobility bursts for squadrons. Right now, it's easy to have a very wide range of capabilities between squadron members because of mat farm and j key. If a squadron gets a ship that jumps a good long distance, maybe squadron mat farm/engineering blasts become a thing. Which maybe Frontier hopes makes mat farm less horrible, and provides a small workaround for the problem of needing to take an un-engineered ship to a g5 pvp hellhole to get it engineered.
It could be that these ships are being envisioned as attack platforms. If they are, I don't think that it will be all that offensively capable itself. A ship that spits out Cutters and Corvettes breaks all balance logic if it then also blows up stuff by itself. I think it will probably be very hard to kill, because it's not a normal ship and we don't know how that will fit into the rebuy thing. But I won't
actually nevermind, I went back through the thread and I see this was a discussion that arose purely from nitpicking language ambiguity