I currently have a MacBook unibody (late 2008) and its started to show signs of aging. Downgraded back to snow leopard and its smooth as but I was very keen to get an iMac. And I was more excited to learn about the 'upgraded' screen. I had a play with the last gen iMac last week in the store and the screen seemed very nice. And today I got a chance to play with the new iMac and boy it's a beautiful looking machine. Supremely thin and elegant. However, the screen didn't jump out at me as anything special. This is strictly speaking about the 21.5". It's good but it just seemed like it lacked sharpness. I then jumped onto the MacBook Air 13" and everything seemed super sharp. And don't even get me started about the retina mbps. They outshine pretty much everything. I am now very confused as to what I want. I can get an iMac , MacBook Air or 13" rmbp. I thought the new iMac screen would help me settle it but its just confused me more.