The problem with 3DTV - aside from the glasses and the nausea and the total lack of content - is that you need to buy an entirely new equipment chain. It is not enough to replace your TV with a 3D capable set, you will also need a 3D-capable Blu-ray player, and - much to the delight of Monster Cable - you may actually need to upgrade your HDMI cables to handle the increased signal bandwidth. The typical HDMI connection in most devices today is 1.3b, but you'll need to upgrade to HDMI 1.4a for 3D.
This has implications for audio as well. If you want to get the best audio out of your 3D content, you'll need an A/V receiver (or processor and separate amplifier) to process the compressed digital signal, amplify it, and pass it along to your speakers. If your receiver - like nearly all on the market today - does not have HDMI 1.4a inputs, you will need to run a second digital audio cable from your Blu-ray player to the receiver - assuming that your Blu-ray player can simultaneously output video over HDMI and audio over coaxial or Toslink outputs. It probably can. Probably.
There are also an increasing number of 2D devices that connect to your television via HDMI, and most TVs and receivers have a paucity of HDMI inputs of any kind. I have 15 devices with HDMI outputs, including game consoles, digital set top boxes, digital camcorders and several smartphones.
With that background it is entirely unsurprising that electronics manufacturers are rushing to update their lines with new A/V receivers that have multiple HDMI 1.4a inputs. For example, Onkyo just announced three new receivers with 7 HDMI 1.4a inputs a piece, including the 9.2 channel TX-NR1008. Of course, this comes literally three days after I bought Onkyo's current generation receiver with 7 HDMI 1.3 inputs, the TX-NR3007 (pictured). Now, I knew that updated versions were bound to be introduced shortly, and, having sent back all my review units, I needed a new receiver now, not in June ...but I still feel a twinge of regret.
Note: the TX-NR1008 is technically a replacement for the TX-NR1007, not the NR3007 which I purchased. I'm sure the TX-NR3008 will be along shortly, along with a new TX-NR5008 flagship, which is bound to have 8 HDMI 1.4a inputs.