Xamarin.Forms is Growing Up.
UPDATE: After posting this, I came across the Xamarin.Forms Roadmap and it looks very promising.
Not sure how I missed this: Adding Bindable Native Views Directly to XAML, but this is big news. You can now bind to platform specific views in XAML when using Xamarin.Forms. Custom renderers and effects are nice, but this takes it a step further. Now you can create a view and have specific controls per platform that will be decided upon at run-time. That's really cool.
Xamarin.Forms is really making headway with many improvements and enhancements like platform specifics and native views. I'm looking forward to starting a new Forms project and taking advantage of these updates.