Too right. I am constantly amazed when I read posts likening Torchwood to X-Files or similar and suggesting it will have just as long a run. I think sometimes it's hard to look objectively at the show and realize that, while it is a Doctor Who spin-off, it's never going to be that iconic, Saturday tea time franchise that will be around for years and years. Also, yes, X-Files went down the tubes toward the end, but quality-wise, I just don't think Torchwood compares. I'm still waiting for a "Family of Blood/Human Nature" episode out of Torchwood, so I'm not expecting Chris Carter levels of amazing any time soon. Anyway, in answer to your actual post, I tend toward thinking there will be an S4, but that will be it. I also think Ianto's going to end up retconned, his choice.