At least the good thing is that this market isn't dying. When Zune came around, the market's dominance was already showing heavy cracks. There was no major consumer need for a large harddrive mp3 player. Whether Surface will be a success is a different story. I just don't think the zune comparison is a very good comparison.
Tablets are a market that will only get bigger. Personally, I can't wait for sundays. FF team on snap-state and Neogaf/the web in the main 4/5th state while I'm watching football. No need for heavy duty laptop time.
EDIT: Interesting enough, I was a big apple fan (other than the iPod) and thought they had the best design in UI until the second-gen Zune. The 'Metro' UI (beginnings) in that update is what probably made me a WP employee today. The blossoming of that design language, and its realization in W8 astonishes me.
I know you are drinking a lot of Kool-Aid but if you think Microsoft have a chance at the next generation of PC, I think you are just kidding yourself.
The stage is set for the next 10-20 years, it will be dominated by Apple and Google with Microsoft as also ran if they are still in this space. Please don't get me wrong, I LOVE Microsoft products from Xbox to Windows Phone. While it is true that the market is still growing for tablet and mobile, people are going to the brand that they know about, one with plenty of Apps and great track record or good price like Google Android.
Microsoft is very late and the players already carp out their space, but it won't be anything more than 1/3 of market. I would be happy just to see people not making funny face when I told them I have Windows Phone and glad if we can get to 10 percent.
Pricing is way off on the Surface, especially the RT, unless on the 26th Microsoft could unveil that it has all the Apps that are on Androids and iOS. No consumers is going to wait for their tablet to catch up, just like no one is buying Windows Phone because quite frankly it is just behind the curve.
I hope I am wrong, because I want to use Microsoft products for many years to come but the pricing on Surface, the slowness of Windows Phone 8 just doesn't show me that Microsoft finally get it.