I actually saw an ad for a 3D ready HDMI cable the other day. As far as I know the cable has nothing to do with the 3D effect. I suppose there will always be those out there ready to rip off the uninformed!!
HDMI 1.4: HDMI 1.4 was released on May 28, 2009, and Silicon Image expected their first HDMI 1.4 products to sample in the second half of 2009. HDMI 1.4 increases the maximum resolution to 4K × 2K (3840×2160p at 24Hz/25Hz/30Hz and 4096×2160p at 24Hz, which is a resolution used with digital theaters); an HDMI Ethernet Channel, which allows for a 100 Mb/s Ethernet connection between the two HDMI connected devices; and introduces an Audio Return Channel, 3D Over HDMI (HDMI 1.3 devices will only support this for 1080i), a new Micro HDMI Connector, expanded support for color spaces, and an Automotive Connection System.
HDMI 1.4 supports several stereoscopic 3D formats including field alternative (interlaced), frame alternative, frame packing (top-bottom full), line alternative, side-by-side half, side-by-side full, 2D + depth, and 2D + depth + graphics + graphics depth, with additional top/bottom formats to be added in version 1.4a . HDMI 1.4 requires that 3D displays support the frame packing 3D formats at either 720p50 and 1080p24 or 720p60 and 1080p24.
High Speed HDMI 1.3 cables can support all HDMI 1.4 features except for the HDMI Ethernet Channel.
HDMI 1.4 cables are about the same price as 1.3. I would expect all the 3D TVs just being released to use/support it. Which means the network socket may disappear from slimline TVs in the expectation that you will use the one on the AV receiver etc.