Gefen will be spotlighting its new HDTV connectivity solutions this week at Macworld Expo. The two new HDTV Switchers –- available for US$249 and $349 — are designed to streamline operations behind the scenes by linking one HD display or projector to up to four HDTV sources. The HD display can then access any source at the touch of a button. It can function as a computer display, video player or television depending on the source (satellite set top boxes, DVD players and computers with DVI ports).