Panasonic virtual reality headset joins the VR party

There was a time when Oculus Rift was the only virtual reality headset that mattered. Then Sony weighed in with Project Morpheus, and for a while there was a bit of a rivalry going on.Lately it seems everyone is trying their hand at virtual reality, though, from Google and LG to toy maker Mattel - and, most recently, Panasonic.The Japanese company this week showed off its own VR headset, which is more similar to the Rift and Morpheus than Google Cardboard or Gear VR - it sports its own OLED disp