The best replacement for web forms is mvc.

The best alternatives to web forms are rated as following:
★★★★★  mvc
★★★★★  windows forms
★★  mvc performance
★★  web pages
★  mvc asp.net
★  mvc 4
★  winforms
  mvc 3
  asp.net mvc
  infopath
  mvc asp net

Your alternative for web forms is not listed? Suggest!
Speaking about web forms, one probably shouldn't forget about web api.

Other search terms related to web forms and their ratings are:
★★★★★ web api
★★★ entity framework
★★ asp net
★ asp.net
You have in mind a companion for web forms and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of web forms in all years. Click on graph for more.
web forms
mvc
windows forms