Iphone 5 is a concept phone and not the actual design. Just a wish list of what people expect and that design has been floating around before the release of 4S.

If we wait for every other model we'd be waiting all our life. There's no official news about a Iphone 5 release but yeah may be next year it should be out.

About Siri its still in the beta phase and not yet perfected, but it works none the less and is still something you dont find in any other smartphone.