Macbook Pro Retina update??

Am I completely hopeless in thinking that a MBP Retina update will happen any time before September or in the first week of September?? Or should I just get the MBP right now so i can enjoy it for the summer. I will be going to University in the beginning of September and need a new laptop (using a 5 year old HP that's pretty useless now) .

Thanks in advanced for your comments!