Will Javascript Web AppBuilder replace Flex Application Builder eventually?

[ThaoLe1]

When will this Javascript Web AppBuilder be released?

[BjornSvensson · Accepted solution]

Thao Le, the UC Q&A has the answer for this (and many other questions):

UC Q&A | 2014 Esri User Conference‌

When will Web AppBuilder for ArcGIS be released?

The new Web AppBuilder for ArcGIS is currently released as Beta and will be final with the September release of ArcGIS Online and with Portal for ArcGIS 10.3.