To say something is "not possible" is sheer stupidity. People have been saying things "aren't possible" since the dawn of mankind, and each of them have tried to back it up with "reasons" why, that they don't even understand themselves. And every year, we prove one more person wrong. I'm sure people 100 years ago thought that traveling to the moon was impossible. I'm sure people 100 years ago would have believed that traveling kilometers in mere seconds was impossible. I'm not nearly big headed or ignorant enough to say something I don't understand and never will is impossible to achieve.
No one can say how much technology will advance.
No one can say how much technology will advance.