@Dilbert - Re the car analogy, fixes to minor issues is one thing. Adding IBIS to any camera body that didn't previously have it is another. The better car analogy would be if the same car from the same company went from 250hp in 2012 to 300hp (a la AF speed increase) with a newly developed 7 speed transmission (IBIS) for the exact same price as the previous year's model.
That sounds like a huge win for consumers.
IBIS for the record, is an astronomically large addition/development to the A7 body. It is the first IBIS in a full frame body which also makes it ground breaking. So it is by no means merely an incremental bump.
So what is there to be upset about?
While it may not be a problem for people that are new to the Sony market, it is a problem for people that are already a part of the market (i.e. already own a Sony rig). This is mainly due to the fact that they are presenting large jumps in tech for the same price in a short span of time. What this does is depreciate the value of what you had already purchased very recently.
In the business world, you depreciate assets very quickly - electronics goods typically are worth $0 after 3 years or there abouts. If you use a digital camera professionally and you aren't writing it off then get a better tax accountant. Same goes for computer equipment. If you've got a really good tax accountant then they can probably find a way to write it off for you anyway.
The argument "don't innovate too quickly lest it devalue what I bought" is an incredibly selfish and self centred perspective to take. You want Sony to design, build and manufacture cameras at a pace that makes *you* feel comfortable? What about the millions of other people that buy digital cameras every year and are more concerned with getting a good camera than what they can sell it for?
Of the millions of DSLRs that were sold in the last 12 months, what percentage would you like to estimate as having been resold online or elsewhere?
It also doesn't serve to create consumer satisfaction as many buyers will be discontent year over year once seeing that they paid the same price not too long ago for something that is nowhere near as good as the new one. Again, we are not talking incremental improvements. Consequently making me uneasy about holding onto any Sony body for too long.
Aren't you assuming that everyone else believes the same as you here, without asking them?
I'm willing to bet that most buyers will keep their cameras and won't care if a newer model is released "next year" or the year after because their camera will keep taking pictures.
But just speaking from my vantage point, anticipation of devaluation and the presentation of something much better pushed me to get rid of the A7r rig I had quickly as I didn't want to be left with it once the mark 2 came out months later. I had realized I wasn't completely happy with it and just pulled the trigger on getting rid of it (much like a hot potato). Otherwise, I probably would have played with it for a few more months.
Good for you! You recognised that you'd bought something that you didn't need/want and sold it.