I've heard a few people contacting NVIDIA and hearing different things out of them regarding potential Wayland support. Most recently I was tipped off about a post of a recent email from a NVIDIA employee.
Your issue was just referred to me.I haven't heard anything definitive out of my contacts regarding planned Wayland support by their binary NVIDIA driver. Obviously when Ubuntu finally adopts a Wayland-based system compositor and Wayland is working better there will be more pressure on NVIDIA and AMD to support this next-generation Linux display technology. Until then, it's unlikely NVIDIA will actively pursue such support, especially this calendar year.
We have a recently opened Feature Enhancement request to evaluate the effort to add support for wayland. We are only currently evaluating the effort to add support and unfortunately have not yet committed to doing the work.
If this is important to you, feel free to contact me for progress updates. Please be aware that if we do decide to add support, it may take some time due to Engineering's workload and priorities.
Let me know if any more questions.
NVIDIA Customer Care
Most of what I've heard talked about with Wayland and NVIDIA binary driver support has come down to providing support for Wayland on ARM-based NVIDIA Tegra hardware since there is more direct customer interest.
For more on the options, see Binary Driver Blobs Aren't Yet Ready For Wayland.
Let's see what happens in 2013.