You can't block fingerprinting completely without breaking a ton of useful features. But the sandbox has a concept called the privacy budget which tries to determine if a site is collecting too much information. It should allow sites that actually use some of these features to continue to work.
The idea is that if sites that query fonts, engage canvas, read the user agent information, etc, they are likely trying to build a fingerprint, so the browser will start to return generic data.
Presumably - hopefully - it would allow users to set their own privacy budgets. Even better if it supports granular per-site control, which may be needed for certain specialized websites.