SQL Server 2014 In Memory OLTP Durability, Natively Compiled Stored Procedures and Transaction Isolation Level

SQL Server 2014 will be released with an In-Memory OLTP feature for OLTP workloads to significantly improve performance and reduce processing time when you have a plentiful amount of memory and multi-core processors. In-memory OLTP allows you to create a memory optimized table which resides completely in memory and is resilient if the server crashes. But what about data durability of memory optimized tables? I heard there is new type of stored procedure which improves performance even further when working with memory optimized tables? What about transactions or isolation level support for these types of tables? For more information click here.