It seems you are asking for a review of "The Dark Knight" and "The Dark Knight Rises" presented in the IMAX 1.43:1 aspect ratio, specifically in a high-quality "portable" format (which usually refers to digital copies, encodes, or potentially a high-end portable projector setup).
The "portable" or "1550 x 1080" versions are specifically designed for screens that aren't the standard 16:9 widescreen rectangle. They look best on: It seems you are asking for a review
Check the Science Museum (London) or BFI IMAX schedules for special anniversary screenings. It seems you are asking for a review
In the film industry, we call that "portable" only if your definition of "port" involves a forklift. It seems you are asking for a review