How real is the Matrix?

In philosophy the question of perception is quite important. Because if what we see, hear, feel, smell, etc is a fake... many explanations will fail.

Scientists frequently speculates using Brain in a vat experiment. Many of us know it as the Matrix. Is it really possible?

Definitely yes:

1. In 1992 The Lawnmower Man moview was very fantastic. Nowadays virtual reality environment is as simple as smartphone with a VR gadget. Progress never stops, so sooner or later we will have such gadgets that will interface directly with our brain.
2. It's easy to explain that this is theoretically possible. Did you ever have realistic dreams? Many of us did. But all movements, sounds and pictures are just a result of our brain. They were not real.