I'll be honest - I'd rather have 20% more battery life than retina. For me, the screen is not pixelated. I like having 30-40% of my battery life left at the end of a full day of use. I'm perfectly happy with my ipad mini 1
Edit: my answer is no I'm not buying it.
Well, everyone has their preferences. I didn't buy the iPad mini 1 because it didn't have a Retina Display so I am waiting for Retina. I will use the iPad to hold about 18,000 photos and counting (I am a photographer) so I would like the screen to be really high res. Besides the Retina full sized iPad and the Retina MacBook Pro (I own one of each) the iPad mini Retina would be the only other mobile device capable of showing my photos in full res. (I shoot with a Nikon D7000)
Will you buy the iPad mini 2 if it has a Retina Display?