It will work fine. It might not be as super as on your computer screen, but you probably won't notice much of a difference. If you want a better HD experience, buy a Bluetooth DVD player for the tv.
Inspiron 1720 with a blue ray dvd drive and Vista Home. I am trying to hook to my Sony Bravia KDL26S2000 TV. I have a S Video connection but I understand it will not carry the HD signal.