People are misunderstanding this announcement.
They are not saying no other Os will work at all, just that Intel and AMD themselves will only supply and support Windows drivers for version 10. So you can install Windows 7 (not easy but possible due to some other tricks they did), but USB 3.1 will probably not work unless you can find an older driver that happens to work and graphics will default to a generic Windows display driver, things like that. In other words, it can work, it just won't be supported/optimal. As for Linux, Linux doesn't rely on Intel or AMD to make drivers for anything, the community makes working drivers for almost everything, it may take a bit and not work as well as the Windows counterpart due to proprietary functions, but they work. it's pretty rare that you absolutely cannot gets something to function in Linux, it's just a matter of finding the info necessary, which I admit is not always easy, but easier and less likely if you use corporate laptops.
For your laptop, you can have Mint split the drive and dual boot (make a backup first!), or better yet, buy an ssd for it and put Mint on that. This leaves you a good drive to fall back on if needed and gives you a nice SSD upgrade. If you decide to forget Windows entirely, stick the old drive in an external bay for backups, if you want to go back, put the drive back in or image it onto the ssd. Honestly, you will never really "get" Linux until you cut the Windows cord because it's too easy to fall back on Windows when you get stuck and by doing so, you may miss out on some fantastic software that not only fixes the problem, but does it better than Windows ever did. I'm not saying it's easy to do, you may feel like a complete noob for a bit, but the end results are worth it.
Some laptops are better than others, corporate laptops tend to do better, but no matter what, expect a 10-20% loss in battery runtime (be sure to install TLP and P-state). No need to run out and buy a bunch of laptops, there is enough Lenovo, HP and Dell corporate lease models on Ebay to keep us supplied for years to come with more still arriving. The Lenovo X and T series in particular have good Linux support. As mentioned by others, should Intel and AMD deny functionality to other systems entirely it would be shooting themselves in the foot as many corporations use Linux as does the server industry. Besides, we would find a way, the more they lock it down and force us onto fewer and fewer options, the more likely it is that someone will find a way around it. Necessity is the mother of invention.