and doesn't the x70 only do 4K at 60 mbps?

There are many X70 users that are quite upset by such a low bitrate for 4K when they've been eagerly awaiting the upgrade. Check out this thread to see what I mean (I haven't read through it all but I've seen quite a few posts where people are not pleased with Sony because of this decision)

http://www.dvinfo.net/forum/sony-pxw-x70-fdr-ax100/528510-sony-x70-4k-lowest-bit-rate-industry.html

One person pointed out "even Sony's tiny "Action Cam" records 4k at 100Mbp/s." However, my guess is that the low bitrate doesn't make it a bad camera or make the 4K upgrade worthless. It probably mostly means that if you need to color correct a shot it's not going to look as good as if it were a higher bitrate.

I still think the Panasonic DVX200 produces MUCH nicer footage than the X70, has better dynamic range, and will be much easier to grade/color correct if needed. Here's a look at some footage from the camera:

KYOTO - A Panasonic AG-DVX200 short film on Vimeo

I think you could fool most people into thinking this was footage from the GH4. While the GH4 is less expensive, this camera has a power zoom lens which is equivalent to a 29.5 to 384.9mm on a 35mm camera, built in ND filters, built in XLRs, dual record slots, 4K 60p, SDI output, and 5 axis stabilizer.

I know what you are saying, but that last sentence seems weird! Why would anyone want to fool people into thinking they are using a camera thats a quarter the price? lol.

I know what you are saying, but that last sentence seems weird! Why would anyone want to fool people into thinking they are using a camera thats a quarter the price? lol.

Matching footage generally. If I owned a DVX200, I could well be shooting with that and a GH4. Hence fooling people thinking they're both the same camera. I've seen some dodgy attempts with a couple of Canon's, where one was a 1/3" sensor and the other a 5D. Client complained cameras didn't match and wanted me to fix it; I said no.

I know what you are saying, but that last sentence seems weird! Why would anyone want to fool people into thinking they are using a camera thats a quarter the price? lol.

I suppose you wouldn't need or want to convince someone that the footage is literally from a GH4. But so far there hasn't been a fixed lens camera that can provide both a shallow depth of field and high dynamic range until the DVX200. While cameras like the Sony PMW-200 are very nice, it's very difficult to achieve a shallow depth of field with it (compared to a large sensor camera). With a camera like the Sony X70 the large sensor makes it fairly easy to get a shallow depth of field but the dynamic range is not very good and the highlights blow out in way that looks very unappealing. The DVX200 has 12 stops of dynamic range in VLOG, has a M43 sensor, and has pretty much everything else that the Sony X70 and PMW-200 have.