It’s been a long time speculation Microsoft would be phasing out InfoPath support in SharePoint. Rightfully so, the experience is awful: it’s bugging, hard to maintain, they don’t migrate well, and generally cause more harm than good.
Officially, Microsoft has recently admitted InfoPath forms are finally being retired and a new forms method (TBD) will be investigated. In a January 31st, 2014 post, the office team declared:
“We are looking to make investments that allow you to easily design, deploy, and use intelligent, integrated forms across Office clients, servers, and services—forms that everyone can use on their PC, tablet, or phone.”
Finally. Heavily relying on InfoPath forms today? The InfoPath 2013 desktop client and InfoPath Forms Services for SharePoint Server 2013 will continue to be supported through 2023 as part of Microsoft’s Lifecycle support policy. You’ve got until April 2023 to figure that one out; however, I wouldn’t bank on a smooth migration solution to whatever comes next.