It's a completely natural feeling. I was addicted to the iPhone (seriously) from around november until february. It sounds funny, but it's truly not. I still don't even own an iPhone and honestly, I can wait now. But it's a terrible thing, all I did was research iPhone information, watch reviews, interviews, even unboxing videos, it was absolutely ridiculous. The only thing that helped was time, and knowing eventually, it will get an update.
Please don't fall in for one, trust me, the MacBook Pro is an incredible device. Yes, it might have a few extra pounds to it, bigger, and not as easy on the eyes (although, still VERY attractive) but it does and can handle more than the MBA. It's maybe not at slim, but it definitely is way more practical. Unless you need two computers, which I don't think is the situation for anyone unless they need them for work, just admire it, but don't buy it. You really don't need it. And although it might be a while, it will receive and update, and then you can go ahead and purchase one. I still use my iBook G4, and trust me, many times I felt the need to kill for a MacBook. Now, truly I do need a new computer because this thing has maybe 2 gig's of room left and is about to kill me. But hey, 3 and 1/2 year later i'm still using this. There's lots of great things about your MBP, and I advise you keep it and enjoy it. If you get lonely, just head down to Apple and play around with it for a little bit. That's what I do