if it uses the same old Z5 sensor, then thats a stupd move..I would expect it to be sharper, yes. But according to Adam Wilt's review of the Z5, he puts the ISO at "somewhere between 400 and 500". The HMC150 is pretty much 500 across the board, so the HMC150 is probably the better low-light camera. He also says that the Z5 loses resolution as you apply gain, which the HMC150 doesn't do, so as more gain is needed the HMC150 will close any resolution gap.
They have a 1/4" CMOS AVCHD, which will probably be sharper than the NXCAM in bright light, but certainly not as sensitive. I think the idea of a CMOS HPX170 with AVCIntra is obvious and would be most welcome, but I'm hoping if they're gonna go that far, they'll stick a M4/3 sensor in there too and make the ultimate handheld digi-cine camera.
i would love to have an hmc40 but it's lowlight turns me off.
m43 sensor seems a bit far fetched isnt it? or does such thing could really exist the near future?