What is Handmaid's Tale about?
It's a futuristic fiction about how people are controlled by the government. Each given their role and no freedom. 
That sounds a lot like 1984, regarding the English Socialist Party's "Big Brother". Are you familiar with that book/movie?
Yes, I've read that many years ago and yes, there are similarities. 
Do you think these "science fiction" movies are warning us or just entertaining us?
To large extent, it's just entertainment, but I know some people believe these things are something that can happen. But 1984 came and gone and none of that happened, right?
I guess that would depend on a person's point of view. It is definitely not "exactly" like the portrayal. But technology and government are both getting much different as we progress towards the future.
I have to agree with you there. I don't know what to believe sometimes. There are so many conspiracy theories and some are too crazy, but some are plausible.
It seems like Handmaid's Tale is also about religion. Do you think religion will be the same 20 years from now as it is today?
I know that truth will never change although fanatics and cults will also be around as always. The methods of delivery may change with time but the message will always be the same.
"Big Brother" will save us!