It's still a rumor and we will find out on July 13, the Panasonic LX-8 could have 4K video! I'm a big fan of the LX-7 and let's hope the LX-8 has built in ND filter. I can imagine saving quite a bit of money for lens and can do macro and WA in the same dive. The GH4 would set me back about $5K for the complete set up with 12-50mm lens and port. The LX-8 could be a $2K set up. So exciting!
The question is, does a 1" sensor and a M43 sensor makes big difference?