Christopher Nolan's Inception centers around a single computing technology: the dream-sharing device. While Nolan already draws a connection between the invasion of privacy and people's ultimately autonomy and control over their self identity (further described in the in-depth analysis section), on a deeper level, Nolan leverages this device to suggest that the penetration of technologies into people's lives can blur the line between free thought and engineered belief.
When such technologies exist, people lose the ability to distinguish what is real and what can be architected and designed by external forces. In Inception, Cobb is seen constantly spinning his totem, checking to make sure definitively he is in "reality." Even the audience is forced to consider what is real, especially given Nolan's choice of placing Cobb's arrival in Limbo to save Saito at the beginning of the movie.
Our realities can be considered biologically grounded, providing a distinct difference between or lived experiences and our dream world experiences. The dream-sharing device's technology fuses these environments together, leading peoples very perception of reality to be destabilized.
Overall, Inception appears to warn against the potential consequences of the technology of simulation, which can transform from simple altering of people's experiences to their identity and to what they perceive as truth, both in their environment and their beliefs. Christopher Nolan, thus, not only shows that these technologies can be misused but they have much broader consequences that can interfere with fundamental human capacities.