Apple's iTV set-top box will take some time to reach the stores, for now, you may try out the Addlogix PC2TV EchoView FM, the codex agnostic device with a DVI output.

With the capacity to receive video (about 720p) at 30 frames per second over 802.11g, wirelessly, from any WiFi-enabled PC, the PC2TV EchoView FM can stream to a display wirelessly, as far as it accepts composite, component, or DVI input, and you can view almost everything on your PC or laptop. The EchoView FM will be knocking the stores as early as February 2007 for a reasonable pricing of $199.99.
Therefore, why to wait unnecessarily, if you have an early opportunity to lay your hands on the potent Addlogix PC2TV EchoView FM.

Via: engadget