I'm waiting, because it will happen eventually. But I'm waiting with a brand new 10.5", and hopefully in 2-3 years the 12.9" is completely without bezel and not very much bigger than the 10.5" with the bezel. I doubt we see it before then. I think it kind of depends on what the new high end iPhone has this autumn. That tech tends to trickle over to the iPad after some time—except 3D Touch, which I think is due to limitations of taptic engine feedback on such a large display. I really want to maximize the usable display space so I can have full size apps in multitasking. One thought I had is that in a few years they could do @3X iPads with an system setting to run them @2X resolution which would give more usable space for multitasking while still maintaining sharpness with the downside of smaller tap targets. I guess it depends on how the math works out on whether that's feasible and within their iOS HIG limits.
My dream next iPad around 3 years from now would be 12" bezel free with a footprint about the size of the 10.5", 10-bit display @3X retina, Touch ID in the display, weigh 1lb or less, 8GB RAM, GPU in the 3-4Tflops range, 3D Touch, 12hr battery life, wireless charging, redesigned smart keyboard that uses a butterfly mechanism and backlighting, dual-lens camera, water and shatter resistant, and has a six-core A11X that could take on a 15" MBP.
