Kills the value argument for Macs
The usual "value" argument about Macs is that while it does cost a bit more to buy, you can also sell it on for more money than a same-vintage PC - and you come out even or ahead of the PC buyer while getting to use Apple hardware. Meanwhile, the older sold-on Mac, especially with some well-thought, cheap hardware upgrades, will be much more useful than those nasty crashing Windows PCs of the same age...
There is some truth to this - I recently bought a four year old, 2007-model Mac Mini (first Core 2 Duo) for about 200 euros, about 40% the original price, and the little thing is almost ridiculously fast after replacing the 80 GB, 4200 rpm hard drive with a 128 GB SSD for about 80 euros (of course, you could do this upgrade with similarly pleasing results with most any PC of the same vintage, but the point is the "greenness" of extending the useful life of old hardware).
If you can't do this any more in the future, it is wasteful for the environment but also for the wallet of the Apple buyer: the value of used Macs is going to plummet - you definitely won't get 40% of your money back in 2016 if you spend 2500 euros on a Retina Macbook Pro today - at least if you can't replace the dead battery, add more memory, or swap a bigger SSD to the old Retina.