It really doesn't matter how good (or not) Windows phone are:
1. The intersection of MS fanboys and people with widespread credibility is exactly 0.
2. Nobody (apart from MS employees and shareholders) wants it to succeed. - Most people who care about tech gear want MS products to fail so the company will die and be replaced by several other, better companies.
3. We all want competition, good products, and good value, but nobody associates any of those things with microsoft. We all reasonably expect competitors products to be at least as good and better value.
4. We'll happily take an apple/google duopoly over another MS monopoly anyday.
So unless the phones are both outstanding compared to the competition, and much better value, nobody is going to care about them. This seems unlikely.
If MS wants people to care about it's brands and products, it needs to split itself up into it's various divisions. Smaller, independent businesses would be forced to compete and innovate instead of relying on marketing and monopoly to ensure success. If WP7 became a genuine underdog, it might actually get some credible supporters. But since this won't ever happen, it will simply die a long, painful and expensive death. So props to MS on the strategy so far.