Seems as far as an ambient computing approach, heads-up displays (or in the future, google-glass type interfaces) make more sense cause you can update the visua

Seems as far as an ambient computing approach, heads-up displays (or in the future, google-glass type interfaces) make more sense cause you can update the visuals easily If you're just projecting onto surfaces seems like it will be slow and complicated to figure out what to project where Plus I'm not sure it's even the best approach for the user. Like the Terminator in the movies had little bits of info overlayed on what he saw in his visual signals .. if this info was projected onto floors, walls, roads it would be confusing