WP8 is slick in some ways, but it's not polished enough for prime time. Take for example the text messages app. Who decided that the chrome should take up so much space that you could only see 1 message in portrait mode (or zero in landscape) with the keyboard open? On a 4.5" screen?! There is no good app for Google Talk; the few that do have it on the Microsoft Store have weird issues (flashing while redisplaying content, logging out/in every time you switch to another app). There are no apps to access OWA accounts (if your Exchange server has ActiveSync off, tough luck). Integrating the "back" feature on your apps and on your browser is an idea that wears poorly. The "people" app is kind of cute, but jumbling Facebook/Linked-In/etc together with your contacts is an idea that sucks more the more you use it. I'd much rather be able to see peoples' timelines than be able to post the same message on Facebook and Linked-In at the same time... The UI is slick but lacks landmarks to help you figure out what's going on on-screen. There are weird and questionable choices throughout the UI. Who decided "+" was the right icon for a new e-mail? Etc.
As I always point out to my friends iOS and Android needed ~3 years to become competitive. It's getting there. The App argument is also kind of flaky... Other than Mint app, everything I use is there.
The OS itself has always been pretty great though, in my opinion - they took a lot of lessons from what Apple and Google did and used those to build a platform that does a lot of stuff right out of the box.
I think your comment about the iPhone 4 + case is funny. I see people carrying around these ridiculous brightly colored foamy brick-ish things that are iPhones in cases, and I wonder why they would put up with that. It doesn't matter how beautiful and lightweight the device inside the case is if it can never come out!
?! Are you sure you didn't buy it from some guy in a trench coat behind a dim-sum dive in Shenzhen?
My iPhone 5 is the most solid, monolithic piece of consumer electronics I've ever seen.
The apps are not on WP8, and I have yet to meet a person who has a Windows Phone as their main device.
Windows Phone 8 isn't going to be forced on anybody though. I expect people to "come around" to it like people "came around" to BeOS. Argued to be superior by its fans, but ignored by the majority because ignoring things is easy.
The OS actually has a lot of features built-in that you have to resort to separate apps for on other devices. And after some use, I don't find the icons any more mysterious than those found elsewhere... you can almost always pull the menu up to reveal the textual name for the icons if you need to know what they do, however.
From what I've seen, Windows 8 certainly needs some polish, just like Windows Phone 7 did when it was first released. I don't have any doubts that both products will continue to mature into things that are better, though.
Microsoft's biggest problem, in my opinion, isn't that they do a bad job - it's that they are too quick to bail out if things don't go their way right out of the gate. If they stick with the platforms they have in the market now, I think consumers will pick them up and enjoy them over time.