Imar,
Microsoft is ending their development support of Web Forms with .net 4.5. Later, in VS 2015, you can still create an app using Web Forms, but you can only target .net 4.5 ... even if the most current .net is 5.0. Going forward, MS is going to focus on supporting/advancing MVC.
Are you going to transition to create a MVC book? That would be great if you did ...
Here's a thought ... React
JS is catching on strong. There is a good Reactjs.net site that shows how to use react with MVC and to render Reactjs code server side. Pretty neat stuff.
However, for larger scale apps using React, it is highly recommended to use the Flux pattern/architecture. Right now, all the tutorials use React + Flux with node. There is a complete absence of material showing how to incorporate the Flux pattern using .net.
Maybe, you could consider championing the React + Flux + MVC (.net) platform ! Right now, MVC + Angular is all the rage ... but within a few years, it feels like React will gain lots of momentum/traction. A RFM platform text is due and I predict will be highly desired by all the .net developers wishing to use React + Flux. There is a niche waiting to be filled.
Please consider it as the .net world needs an expert to guide/introduce Flux into .net ...
Thanks for listening ... ;-)