The ocean really WAS safeThe aliens have an aversion to being over water. If they would have gotten to the boat they would have gotten to safety.
All of the bio machines they see later in the movie are "run" by characters we have already seen.Terry, Walt, Ray, whether they are conscious of their actions/former lives or not, they were assigned to the building because they were harvested from there.
Jarrod remained in control of his brain because of The Power of LoveYes, repeat exposure seems to be part of it, but when he was choking Oliver all Darth Vader style, it was Elaine's voice that got him to stop, and looking into her face made the scary dark veins go away. They are even kissing as the aliens are taking them up to the mothership, so what if there was some sort of brain chemical thing going on under those blue lights?
There aren't really any "aliens" per se' - the invaders are nanotech bioweapons that mindlessly roam the cosmos.It's a Doomsday Device that got out of hand. Poor earth is just another planet harvested. powered by brains. That has got to be a pretty damn specific design, and there's only a few ways a race with that level of technology could know enough about a human brain to make their machines interface with them THAT well. 1.) They've been here before. I don't like this option, because it means that they'll be here again, but why did they need to come back? Humans can be bred, but there's always the possibility of a plague, cataclysm, shipping error, whatever, I guess. 2.) The aliens are biologically identical to humans, and this is them drafting new units for some war effort. This is how their technology is so closely attuned to our biology and can use it as a processor / battery. Plus, it's a lot easier to justify a questionable military technology to the local populace when you can tell them it's another planet being razed for the resources. It isn't their people getting slaughtered, and they have a war that needs to be fought, so it was an acceptable option, because humans are bastards even if they're not from Earth.
The Aliens are the Mi-Go and this is actually a Cosmic Horror storyThe Earth is at the mercy of all-powerful Eldritch Abominations who effortlessly suck up millions of us in one night. They take our brains out and put them into other things, just like the Mi-Go. Even our mightest weapons are useless against them, merely delaying them as they regenerate.
Skyline takes place in The Matrix universe.Think about it - there is no logical reason for the programs of the Matrix to have billions of humans laying around in a virtual world... unless they are actually aliens using our minds to power their war machines. (Makes more sense than using our bodies for heat.) The apartment the characters are in is simply a holding cell for various captured humans - they THINK they're in the real world, but they're not. It's why they can't call out and there's nothing on the Emergency Broadcast system. The big aliens are Agent programs - they only showed up when the characters tried to leave the apartment. If the characters had been gotten to the building's boundaries, they would have realized they were in a holding area and that there was probably no way to reach another building, let alone the marina.
Skyline is a big paid ad for Mass Effect 3Tentacled eldritch aliens are harvesting humans, striking every major city on Earth, and then render their bodies into generic paste after scooping out the brains to power bio-organic husks that glow blue.
The aliens are protecting the galaxy from a dangerous threat and are using humans to help in the fighting.The aliens are a race that, once they explored the galaxy, discovered a horrible threat to all life in the galaxy. They begin fighting back, but take such heavy casualties that they start using drones to do the fighting. The drones are programmed to seek resources from compatible worlds, and thus come to Earth when their supply of CP Us starts to run low.
The aliens are Phyrexians.They share the same aesthetic and the same assimilation goal. Their ships even seem to Planeswalk and regenerate.
The aliens are Collectors.Tanker◊. Collector◊. I think we're done here.
Humanity is not doomed.The aliens actually have a quota of brains they need. Once they get it, they'll leave. The aliens farm huge population centers, and most of the country and smaller towns will be untouched.