C:Amie,
It's great to compare Windows Phone 7 to Windows 8
Because there are similarities and differences.
WP7 did not use the WM6 UI, and many long time WM users weren't happy about it. In a way I wished it had compatibility with WM apps, possibly with a dual UI much like Windows 8. It's not like it's impossible with a larger
(at the time
) capacitive screen, as the HTC HD2 has shown, and the WM UI has evolved enough in its final release 6.5.3 that it's very usable without a stylus.
If WP7 did indeed have a dual UI, it would have the exact same criticism as Windows 8. Because WP7 Metro UI, like Windows 8 Modern UI, has 60% of the functionality of its predecessor.
It was a bold move by Microsoft, to abandon compatibility with all software written for PPC/WM for ARM, and along with that a lot of long time customers. However, during that situation, when WP7 was released, WM market share in the traditional smartphone market has been completely eclipsed by iPhone's penetration in the consumer market, not to mention the existing threat from Blackberry and new threat from Android
(which was much improved at 2.1
)*
In other words, WM was dying, and Microsoft had little to lose. WP had to succeed, and shredding the WM baggage was necessary to ensure WP was consumer friendly.
Now Windows 8 was in a totally different situation.
Windows 7 was still the dominant OS on new PCs. Abandoning compatibility with it would be crazy, unlike the WP situation. If anything that would make more people consider switching to competing systems such as Mac and Linux.
Although, if you look at Windows 8 Modern and imagine that it doesn't have Desktop UI, it is still a very functional computer. It might have 60% of the functionalities of it's predecessor, but it's not like you will be "stuck" and unable to use the system without switching to Desktop. Sure, there are many things you cannot do here that you could do on the "good old" Desktop, but those are relatively advanced functions that most users do not need to access. It would be like using a Windows Phone 7.
So here I am using the Windows 8 Modern UI almost exclusively. Only occasionally dipping into Desktop for compatibility reasons with previous software; like I said before Office is not on Modern UI yet, and WP 7.5 still needs to sync with Zune on Desktop. There are things I miss, of course, like I cannot even sort my emails. But like WP7 got several updates until settling at 7.5, I am guessing that Microsoft will update Windows 8 with new features that most users find useful or even necessary. At which point you will look back and say why did you even bother with Desktop.
There was a time when if you said you will never use DOS commands again they would think it's funny.
*If anyone followed my phone shopping thread two years ago you know I did consider a Symbian and an Android phone before finally choosing Windows Phone. At the time the Android phone I considered was the Acer Liquid E that came with Android 1.6 but upgradeable to 2.1. However the phone was so old and the upgrade was so new at the time that I never saw a display of that phone with the newer OS. Had I tried the phone with 2.1 it might have impacted my decision making. The point is that WP7 came just in time to compete before Android 2.x became widely available, which then developed into the most popular phone platform today.