I didnt see anything impossible in the trailer (exept maybe the flashy gfx)
"He got all the way into my wireless network" - why not? break wep/wpa, exploit OS bug
"He hacked into my car's computer." - has been demonstrated multiple times on both white- and black-hat convos... bluetooth all the way!
"Untraceable website" - let me see you trace double-flux (or even single-flux) dns routing. Storm worm/botnet has been using single-flux for a year (exactly year in 2 days :)) and their control-server is yet to be traced