This is a Realistic UI demo and proof of concept application. Please use tablet or desktop for a better User Experience.
With the intoduction of Single Page Applications, we no longer need to worry if user navigates to another page before the executed async request is finished. This means that we need to block a certain part of the User Interface, for example, the submitted form fields, rather than the whole application.
Another extreme is "Optimistic UI" concept. The idea is to update the interface instantly in a way, which is expected if the async operation is successfully performed. Believe me; it brings a lot more problems and UX issues compared to the gains it provide. I am currently writing set of articles on this topic and will add links here upon publishing.
Realistic UI is sitting somewhere in between: from one hand it is not blocking the whole UI, from another — it does not try to trick the user.
Realistic UI concept can be broken down into three major parts: