If this turns out to be true, our computer upgrade cycle could last 7-8 years. Just buy a new GPU and plug it in! But I heard those external GPU's are super expensive you might as well build a gaming PC.
This will likely already be the existing upgrade cycle on most desktop based systems that are built around a more traditional PC build.
the current crop of Intel Desktop CPU's (i5s-i7's @ 88w), even the last couple gens (Ivy, Sandy, Haswell) are really capable CPU's. in normal desktop usage, they're likely not going to show their age even yet. Even in gaming, they're still not the primary bottleneck.
People running these current line of Intel CPU's aren't likely going to be replacing them in the next 3-5 years at least. Though, they'll still likely follow the GPU upgrade paths
This is where the process of using soldered in GPU's, and RAM in a desktop by companies like Apple and other "prebuilts" (apple isn't the only one doing this anymore) is annoying to the few of us. in a desktop like system, there's absolutely no need to go "super thin" and create a system that has complete soldered in parts, EXCEPT, to shorten this cycle by using GPU and RAM iterations to convince you to upgrade and buy a new computer.
most gamers, 1 year from now, when their GPU's can't keep up, will replace just their GPU. But maintain their core system for ~5 years. With this newer ethos of soldering parts, thats now 1-2 years. A much more predictable buying habit and more profit driven madness.
Give me an Apple computer with upgradable GPU (using off the shelf parts), even if it were external box, running OSx, and I'd probably jump on it in a second, Especially if it were laptop based.