Anyone (like me) with a flat screen TV is most likely already receiving digital transmission (Freeview), so there is nothing to change. If you also want to record then the old VCR is useless and a new HD/ DVD recorder will set you back $500.
Here's the irony: we now have large screens, flat screens, wide screens, high definition screens, surround sound, and dual channel recorders with delayed playback, but there are hardly any good programmes to be had on free to air TV.