If you can do with your current set - i would wait. Scenario 1 - reviews come out, VT/ZT60 isnt much of a upgrade - get the 50 series at a clearance price. Scenario 2 - Panasonic improves on performance (black level, 3D, etc) and fixes things like DSE, IR - get the 60 series and have best possible tech for a year.
If you can do with your current set - i would wait. Scenario 1 - reviews come out, VT/ZT60 isnt much of a upgrade - get the 50 series at a clearance price. Scenario 2 - Panasonic improves on performance (black level, 3D, etc) and fixes things like DSE, IR - get the 60 series and have best possible tech for a year.
I like this idea, but by the time the VT/ZT60 hit showrooms (May,June) one may be hard pressed to still find a VT50 on the market.