We've posted a video of a demonstration that the Real World Performance team created to show that Database In-Memory enables real-time analytics to run directly on a customer's application database. It shows the impact of running a high OLTP transaction workload and an analytical workload with and without Database In-Memory enabled. You can check it out here. The bottom line is that Database In-Memory has essentially no impact on the OLTP workload. True real-time analytics!