Combat in the far future won't involve human soldiers. When you can design machines with the necessary intelligence (note, not necessarily AI), you'll be able to develop heavily-armoured drones which don't miss when they target something, can react many times more quickly than a human and move much faster.
It's scifi; when have we not been able to shoot holes through any scifi plot?
Well just to harp on Aliens a bit more...Colonial Marines are less well equipped than today's soldiers, no night vision, no thermal vision, projectile weapons only...
Armageddon: the movie you can't just shoot holes through its plot, you can drop entire texas-sized meteors through it...In the words of Graham or maybe it was Alstrong, "One word: Armageddon!"
Worst big-budget action movie ever made, I think. It's just....terrible. Awful. So much wrong in two hours has never before been made, and never since either I'd prefer to think.
Btw, great trivia noting the actors from Aliens who appeared in Cameron's ex wife's movie about blood sucking outlaws.
You don't need fancy lasers or phased plasma rifle or any stuff like that, and in a theater of war often you don't want to. A theoretical handheld laser would be much more complicated to build, certainly much more fragile. Muck on the lens would screw up the lens when you fire the gun and so on (and muck being so prevalent outside of research labs that you really can't ignore that as a factor.) What happens when the air is dusty or foggy? Bullets just penetrate through that shit, a laser wouldn't necessarily. Also you wouldn't want to blind yourself or anyone else of your own troops when firing it, you'd need to wear goggles which creates more issues.
Near Dark?
I have to say that Cameron didn't exactly cover himself with glory in Prometheus when he had a much freer creative hand due to CGI and the like. I know which of the two movies I'd rather watch.
new ?
I thought it was just a re release.