WordPress 4.0 is still in beta version it will be good, not to use on your production wordpress website, build a testing envirnoment on your local machine and play around. In wordpress 4.0 beta there are major improvement were done for more interactive user expereience. Please visit wordpress.org to know more about this new release.
We are going to start WordPress development Training on July 20th 2014. Please register now, few seats are left. If you want do in next batch you can inform us, from when you want to start. Will book you in advance.ï»¿