If you use the stable Debian release now it's time to start testing the transition. Make sure to get bugs that aren't discovered yet or vital to your operation reported or fixed.
Don't complain if something in Jessie that's important to you breaks, help now to make sure it won't.
I'm on Wheezy right now on my Ultrabook (using just a couple of backports, but almost exclusively Wheezy at the moment).
Are you saying that Wheezy users should migrate to Jessie to start finding bugs? Part of the reason I use Wheezy on this computer is because I know it's rock-solid and everything "just works". If I had another computer running Debian I would run Jessie or sid on it, but to be honest, I need to make sure that I have one computer that I can depend on reliably (which is why I use Debian stable to begin with).
If you're using Debian in a business environment, try upgrading a copy of your staging environment to Jessie to see what problems you encounter, so that they can be fixed before release.
If you're using it on your desktop or home servers, you could also upgrade in order to contribute testing to the project, but only if you're prepared for some things to potentially break.
Don't complain if something in Jessie that's important to you breaks, help now to make sure it won't.