Don't you think some of those dismissals a little unfair? The iMac hasn't really been updated yet - there are strong rumours of retina iMacs coming in 9 days from today. Would a retina iMac be a show-stopping product? Yes, it would.
iOS8 is one of the biggest updates ever. Criticising is so easy, but iOS8 also brings the biggest things people have been asking for since the first iPhone. There are custom keyboards and notification centre widgets, actionable notifications, not to mention a quasi-filesystem (via iCloud Drive) with support for third-party document providers. You can finally open documents in other apps without every app getting its own copy. For business customers, that means seamless integration with sharepoint. Bugs happen - they emerge, they are fixed, new bugs are found, etc. Is iOS8 a show-stopping product? Yes, it is.
Yosemite is another big update. The UI changes aren't that enormous, historically speaking (OS X has had some really big ones, like when people on Tiger woke up to find Leopard). The best thing about it is that it draws the Mac and iOS even closer together - there's iCloud Drive, the new Photos app to replace iPhoto and Aperture, mostly the same widget and extension points on both systems, and of course Continuity/Handoff. Only with Apple can you send SMS messages from your laptop, desktop or iPad and receive calls on all of them. When you take that together with iCloud, Yosemite fits perfectly in to the role that the Mac now occupies. Is it a show-stopping product? Yes.
I don't know - to me, it seems like Apple has a pretty rocking product pipeline, and that's even before you get to the iWatch. Who on Earth can even come close to competing with them? Microsoft isn't even a contender - they just realised that Metro start screens are stupid for people at desktops. The big new feature for their next version of Windows is the return of the start menu. The only company who can really compare is Google, and Apple stacks up pretty well to them, too.