Ditto. Would like to look without having to go to save for web and devices first.
Web pages can read GIF, JPeG and PNG formats so you'd need to save in one of those three before being able to view it in a browser. Directly saving to one of those would bypass the compression step that the "save for web" applies so that you'd still see the file at its original resolution. (or as close to it as those file formats support)