Originally posted by Vantage-Point Honestly, if Pentax can keep the K-02 roughly the same size (with bigger grip) I don't see what the problem is. The Panasonic GX85 is about the same size as the K-01. The K-01 is just thicker
Not exactly. Looking from above, the GX85 is 25% thinner at the thinnest part of the body. This is important, because the K-01 uses every bit of that thickness, but does less with it (the GX85 has a tilt/touch screen and a much more powerful processor). If you want to add
anything to a K-01, you have to make the body bigger. If you wanted something like a K-70 with an EVF instead of OVF, that's quite do-able. But if the goal is the smallest size possible, you quickly hit limits as to what you can squeeze in, while comparable short-register MILCs put more features in a smaller body at a lower price.
Side note: looking at the GX85's service manual, the main circuit board is actually about the same size as the K-01s, but where the K-01 board is crammed on both sides with components, the GX85 is fairly sparse. This is another advantage the other companies have - they make their own components, where Pentax combines off-the-shelf parts, which takes up more real estate on the board. So the GX85 has a quad-core image processor with room to spare where a K-01 has a dual-core without room for even an "image accelerator" co-processor.