Five Most Memorable Sci-Fi Movies

There must be thousands of sci-fi movies made over the past 30 years. I have seen a number of good ones. Not all of them, of course because my wallet won't allow it.
The ones I remember with some fair degree of clarity are Blade Runner, Matrix series, Superman series, Alien series, and Star Wars episodes.
I suspect Hollywood only echoes what is already being experimented upon or received through the grapevine that certain scientific possibilities are skirting on the edge of reality.
For example, about 30 years ago, the Star Trek series showed Capt Kirk communicating with his starship crew using a small hand-held communicator device. Today we have cellphones of similar sizes, perhaps even smaller.
About 40 years ago, Dick Tracy of the comic strips was shown talking to his assistants via watch TV screens. Today, this has become a reality with 3G handphones.
That's what I like about the really good sci-fi movies. They provoke sensible and intelligent thinking. Anything that can be conceived in the mind of man, can be translated into reality. Almost nothing is impossible.
Star Trek has its famous "beam me up, Scotty!" line. Recently, scientists have achieved a similar albeit on a very much smaller scale, the transfer of gases across the room. So the possibility is there. In future, the deatomisation of any solid state will be rendered possible and absolutely safe.
However, we are not there yet. Futurogists are already talking of living on other planets. The fact that our space exploratory craft has reached Mars is already an indicator of possible happenings in the next 50 years or less.
Sci-fi movies experiments with our mind. Scientists take the sensible approach but in the imagination of man, there are no limits or ceilings.
There will come a time when anything which are considered impossible right now are accepted facts in the future. Take for example, the case of hovering vehicles. Right now, man has not yet conquered gravity so vehicles on the roads still need wheels.
In future, there will be vehicles which will hover silently on solid surfaces and leave no residue of any matter which will pollute the earth.
We are now living in the realm of infinite possibilities. With our imagination and a little entertaining help from Hollywood studios, we are going to achieve the impossible dreams. And we will have fun doing it. That's the way, life should be!!