Actually hope Windows 8 gives more competition to the market.. the problem with Microsoft is:
a) they are late to the tablet game like they were with the Zune despite having some serious advantages over Apple (Zunes larger screen, better sound quality, better navigation, more modern looking interface, etc.) being late cost them.
b) They can't seem to get developers for their new platforms this was a big problem with the Zune HD despite having superior hardware at the time.
Only way they are going to be able to compete with the iPad this late in the game is to get some developers on board is by enticing developers in someway to get a decent selection of software up by the time it officially launches. They don't get a decent developer program going it is going to be doomed from the start.
Even if they get a way to get the current PC software to work on Windows 8 Tablet its going to be rough since the PC software is designed for mouse and keyboard in mind.
Windows 8 isn't even out yet so the idea of the comparison to iOS this early in the game is kind of silly.
----------
Honestly I feel like Windows 8 tablets will become Apple's real competition in the tablet market. Android tablet makers still can't get that right. The only thing is that Windows 8 tablets will need some great hardware to compete with the build quality of the iPad (I'm hoping Nokia does something good here like they are with the Lumia phones).
Its getting software developers to develop for Windows 8 that is going to be the biggest hurdle. I mean Android and iOS already have a pretty good foundation of programs, Microsoft is going to have to entice these developers to develop for yet another platform.
Problem with Android is there is such fragmentation with 15 bazillion different versions then its further complicated by a real lack of software compatibility with tablets. Most Android apps are actually optimized for phones rather than tablets. I've noticed on my Xoom that some software just simply won't run correctly or its just the mobile phone version blimped up to fit the screen rather than upgrades making it compatible with a 10.1" screen.
Bottom-line, I'd love for there to be more competition in the market of tablets because it makes companies bring their A-game and compete rather than stagnate the products. The iPod line is a great example of what happens when there is no real competition in that segment, they get little to no updates.