Technology in 20 years?

How much do you think technology will grow in 20 years? Do you think we will finally see hover cars? Or do you think the growth in technology will be modest?
I do believe tower based computers will almost be obsolete by that time. Desktop cases will probably be considered “beastly” by that time as well. I guess what I’m really asking is do you think in just 20 years earth will be as futuristic as the settings in Terminator or I-Robot?

*I don’t think I-Robot was the greatest movie ever, I just mentioned it for a visual reference.