I don't know about you guys but the issue for me is at as much waiting as to not knowing when the damn thing will be launched. I decided to sell my 2011 MBP 1 year ago in September anticipation of buying the new 2015/2016 model in October or something alike. The worst is that we're waiting like idiots without even knowing when that thing might be released (refer to various past events where everyone hopes' went up (and then dramatically down).
If Apple tomorrow tells it will be released in December 2016 or it will be released in 6 months, then fine. It's a long wait but at least it would be my choice to pick the way i wanna go (buy old model, buy something else or wait).
Anyway, sorry for the rant ... still hoping we'll see something in 2016 but doubting it more everyday :/