For a normal user, how much does the OS matter in 2013?
The OS playing ground is much more level today than it was in 2008.
I'll be upgrading my iPhone 4 soon, and frankly, I'll be considering everything OS out there. I'll actually be choosing based on hardware more than OS, because all the web services that I use are supported by every operating system.
I guess if you're really into apps, the ecosystem might matter, but I suspect a normal, non-geek really doesn't need access to hundreds of thousands of apps if their core needs are satisfied.