No doubt that some will need this, but it will be a wait for me. I plan to skip this time. Actually I just got K9U at Christmas 2013 and I had skipped K8. My plans have been and will continue to skip every other update especially if there is mostly electronica. While I would like Action Strikes, I can wait. I have not begun to unfold what is in K9U; it is plenty for me now.
Having said this, I would welcome the lighted keyboard, but not at that price. Having lights to help with splits and keyswitching is actually a good feature. I have been in the market for a midi controller for my second computer in my home office, but NI's price is out of my budget.