The following features will be included in next releases.
Complete the C++11 missing features, in particular
C++11 compliance: Allow to pass movable arguments for call_once.
C++11 compliance: Use of variadic templates on Generic Locking Algorithms
on compilers providing them.
Add some of the extension proposed in A
Standardized Representation of Asynchronous Operations, in particular
Synchro: Add polymorphic lockables.
Synchro: Add a synchronized value class.
Async: Add future<>.then.
Async: Add when_any.
Async: Add when_all.
Async: Add async taking a scheduler parameter.