Although it is not our immediate, top priority, we are in the process of implementing WebSocket support and GraphQL query subscriptions within Apollo. This will allow us to have real-time updates through GraphQL. As Lee Byron's talk at React Europe mentioned, there will also be additions to the GraphQL specification such as the @live directive that will allow us to implement more real-time functionality within Apollo that may feel similar to Meteor's real-time functionality.
In terms of real-time within Meteor, the 1.5 release of Meteor will integrate with Apollo and GraphQL. Although it is not yet perfectly clear what this will look like, we expect that we will be able to leverage existing real-time portions of Meteor (e.g. livequery, a well-tested WebSocket transport) in order to deliver strong real-time support for GraphQL.
Given GraphQL's data source-independent nature, it should also be possible to implement connectors for data sources, thereby allowing livequery-like real-time functionality for applications using the Apollo Stack.