You only have to look at apple for that...only a crazy person would buy an ipad 2 a week or two before the next one is launched (unless they get a good price deal).
However...considering the cost to buy the Rpi, and it's probable use in things like industrial controllers (when they are easy to get) etc etc that effect may be less of a problem.
But, as soon as you announce something you just end up with endless bombardment of questions about what it will be, and if you tell them, it is an endless line of moans instead.
Interestingly, everyone still tends to focus on the curve as a way to get more for the same cost...As the foundation has done, turning it around you also get the same for less!
So...they could just produce it for even less money instead of bumping up the spec.
However, everyone wants more power, more features etc so keeping the same price window could mean...improved CPU, more RAM...OR...
It could mean they could include:
VGA out, realtime clock, switchmode psu (reduced power usage), extra USB, onboard LED/switches, wireless connections such as bluetooth/wifi...etc etc.
Mind you, the other side of the coin is that prices could increase for some unexpected reason...which would mean some hard choices...
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