While PCs and peripherals such as MP3 players have traditionally topped tech wish lists, this year retailers are expecting some changes, thanks to fast-falling prices on new TV technology. Flat-panel displays can now be had for $1,500 to $1,800, making them more competitive than ever with laptops and other computer gadgets. Televisions won't be the only thing on consumers' minds this weekend. Notebooks, MP3 players, digital cameras, home networking equipment and even satellite radio receivers are expected to be hot sellers during the