I think that's Apple's message, like it or not. Pro users who want to stay with Apple need to get settled on a 2-3 year upgrade cycle. Buy the new one after about 3 years, sell the old (prices should stay reasonable), and you have new graphics, updated CPU, faster ports, etc., for roughly what it would cost to upgrade and update everything at once in a tower anyway.
Not so bad if you think about it. The only thing you lose is the ability to do minor incremental updates. But those are slowing down these days. Think the wait for 14nm was bad? The wait for 10nm will be a long one too.
One thing that you have to realize is that currently AMD gets 227 GPU dies that are ready and working. On average, every single die costs AMD... 87$. That is how high cost of 14 nm wafer is currently. 20k Dollars. Nvidia has exactly the same situation, however, TSMC has a bit higher prices, it costs them 15K to buy a wafer and they sell each wafer for 18-20k depending on volume. Nvidia did not stacked a lot of those GPU dies, that is why there are huge shortages in the retail. Few reasons for this: Very high risk on production, secondly, very high prices of wafers, thirdly, very limited factory slots on TSMC. The production costs or rather wafer costs are presumed to lower over time, however we are talking not 5K$ but rather 12-15K end price for every wafer on 14/16nm node.
Why I write all this? Because production costs on 10 nm will be 4-5 times higher than are currently. That is why AMD says that 14 nm is the last node where we can see 600mm2 GPU. And multiple GPUs but smaller on smaller nodes are the way to go in future. Today we see something like this:
~115mm2 die size - low-end.
~230mm2 die size - mainstream.
- 300-400mm2 - midrange.
>400mm2 - high end.
In future:
<100mm2 - low-end.
<150mm2 - mainstream.
<250mm2 - MIdrange
<350mm2 high-end.
With extreme emphasize on multiple GPU setups.
Unless you want to pay as a consumer 40k$ for Titan X GPU class, that is reality.
More performance you will get not exactly with every node, but with architecture changes, and every single silicon vendor has to focus on it. That is why AMD changed their approach, and Vega is 14nm new architecture, from AMD, despite the fact, that Polaris this year is also new/updated architecture.
One more thing: I have many, many times written on this forum that future market is 90% BGA. And the shoes are starting to drop again, despite many people laughing about this possibility.