Engadget - Recently Sony invited us to check out its forthcoming 84-inch XBR 4K LED TV and we couldn't resist an opportunity to get an idea of how well the company's $25,000 flagship stacked up against the competition. Perhaps trying to simulate an in-home viewing experience, Sony packed its gargantuan TV into a family room setting and allowed us to give it a spin. While we didn't get to channel surf freely, the provided stock media did a great job of highlighting the display's capabilities. Images were crisp but fluid, while colors remained strong and organic. One of our biggest concerns was that things would look too good and possibly appear unnatural.
SonyRumors: Pricing for Sony's mid-range 2014 4K XBR-X900B series television fleet which offers a 3D Triluminos display, 4K X-Reality Pro engine with X-tended Dynamic Range has been reveled for the 55X900B, 65X900B, and 79X900B.
SonyRumors: Pricing for Sony's entry 2014 4K XBR-X850B series television fleet which includes XBR-49X850B, 55X850B, 65X850B, and 70X850B has been leaked, revealing them to be more affordable to a wider range of consumers
That's not a bad price at all for a entry 4K TV, seeing how it's an XBR unit and not just a random lowend unit from unknown manufacturer.
$2000 for a device that really can't even be used properly yet still seems a bit expensive to me.
That's just me, though.