Windows, Mac and Tablets

I’m thinking of getting an IPad, though I have a new-ish windows-based pc on which I use Scrivener. I’m wondering whether it might be wiser to get a windows-based tablet…then take out my mac-lust on an IPhone instead…farther out in the future. Thanks for any thoughts you might have, including comments about tablets you have used Scrivener on.

What I’m hoping for in a tablet would be:
Small size (the IPad Mini with Retina Display is of interest)
Large Ram
Long Battery Life
Solar-powered keyboard (shooting for the moon)
Excellent camera (still and video) and display
Access the web, mail, freely, any client
View videos such as on YouTube or Netflix
Play music such as Pandora
Read books online