the question is... update with what? except LED screens, there aren't any current major updates that would warrant having a refresh. Also, why would they put in the new technology in the macbooks first without offering the best features on the pro line. people have already put their thoughts in other threads. Searching the forums will give you the best results. Some keywords to look for are "Robson" (the new chipset or whatnot from intel that will be arriving Q2)
....and consider putting a question mark after your title "update soon." it may seem presumptuous that you have a statement about an update rather than having a question asking for pure speculation.