It's 54-inches, it's plasma, it's just 1-inch thick and it's got wireless HDMI - are you really all that surprised that the Panasonic Z1 Plasma HDTV is expensive? Early pricing for the Panasonic TC-P54Z1 suggests it'll cost a cool $5,999.95 when it begins shipping in June.
For that $6k you get 54-inches of Full HD 1080p, a native contrast ratio of 40,000:1, 24Hz Cinematic Playback and THX Certification. There's also Neo PDP low-energy panel technology (you'll probably want to save on power bills after shelling out for the set) and included speakers and stand.
The wireless HDMI box - which is included with the Z1 - not only funnels video and audio from your DVD, Blu-ray or Media Center PC to the HDTV, but has VIERA Link Internet connectivity and a VIERA Link SD card reader too. That all means that the only cable required to your new wall-mounted $6k Panasonic is the one providing power.