This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
If you are just a user, doesnt do anything with development and stuff like that, you could wait more few months. I think 6 months is enough time to most of issues to be fixes. But in the same time, if nobody gives a try it can take longer. Using this graph as reference http://ondigitalmarketing.com/textbook/files/2012/01/640px-Diffusionofideas.png I think we are already in early majority. My technical opinion is that you will not have any issue changing to Java 8, there changes weren't so big as it was from java 6 to java 7. There will be probably soome big change in next major release (java 9), but that is another thread =)
If the auto-update mechanisms still pushes Java 7 updates -as Derik said- I rather doubt that as far as the user population at large is concerned. "Innovators", more likely - developers and other techies.