Its a totally different technology used in film (the traditional kind)
CRT (tube-based) TVs are made up of lines, with phospors illuminated by an electron gun. Plasma and LCD consist of individual pixels to make up the image. This is what makes the TV's resolution. you get 480 lines on NTSC standard (525 with PAL) and the signal is either interlaced (old-style) or non-interlaced (modern) Interlacing means every other line is drawn per frame (ie. lines 1,3,5,7,9 in one frame, then 2,4,6,8,10 in the next) All these elements affect the sharpnss and detail of the picture.
Film is effectively a continuous spool of analogue photographs (in simple terms) and therefore doesn't actually have a resolution. It all comes down to the quality of the lens on the camera and the size of the film stock used (15mm, 35mm, etc)
However, digital film cameras are hitting the big time now and these do have resolution based on pixels (like any other digital display device) Rest assured, however, these will produce much higher resolutions than your average HDTV will.