If you have a Razer laptop that's broken and out of warranty, you might have an option other than paying US$700 for an out-of-warranty repair from the company: Brenden Henry is a computer enthusiast who grew up fixing phones, but now specializes in fixing issues with Razer's laptops.
http://www.notebookcheck.net/Specializing-in-Razer-laptops-enthusiast-repairman-aims-to-fix-what-Razer-can-t.195612.0.html
Will 24/7 gaming load to test long term durability be the next new test in Notebookcheck?
I'm not sure. Maybe it should be something we put gaming laptops through. ;)
Realistically, though, you aren't going to see any components break down in a measurable way with just 24 hours. It will take months for problems caused by overheating to become apparent (battery wear), and even then it will likely just be a sudden, unpredictable bricking.