do you think that world could be a place that has flying cars, weird houses, lots of technology and weird alien costumes? like in movies?

Yes. The world we live in now was actually fore seen by other people talking about how they thought the future (now) was going to be and it's true. SO yes, that is very much possible. Besides we have hovering skateboards now.

It sometimes seems that way particularly with the costuming with Cosplay & Halloween and some of the ones who like to just stand out in a crowd. Also the numbers of new immigrants who continue in their native garb seems to increase. Some a bit too exotic for my taste.

No flying cars yet but robotic driven GPS cars are almost available for some. I just hope these become affordable before my eyesight goes or when they take away my driver license.

Yes I believe that's where it is heading....think about all the cost of roads freeways ...

I thought by now it would have already happen.

Yes; Think back to the 1600s, as compared to now !

Yes. All of this is possible in future.

Nope! Not in any of our lifetimes.