I've been working on an article about the current state of realtime rendering and how it pertains to architectural visualization, and I finally finished it and posted it to the Method blog. If you model and render your projects, it's probably worth reading.
I’m sure you’ve heard of "realtime rendering," but just in case you haven’t here is a quick explanation: your 3d object or scene is being rendered by the computer on the fly, allowing the person viewing it to interact with the model and look wherever they want. The most common application of it is in video games, and as far as architectural visualization is concerned, it’s what’s next. Here's my current thinking on the subject.