Yeah, but the rest of us don't want that because we have to pick up the slack in taxes. Personally, I would prefer if I just didn't pay any income taxes. That way, I would save a few hundred thousand and my employer could pay me a hundred thousand less and I'd come out ahead.
You should be opposed to this California law then, because it is codifying that these are required business expenses and eligible for exactly this treatment.
There's no new law. This is just someone's interpretation of existing tax law. You'll be hard-pressed to gain anything worthwhile from this. Doubt it will even exceed the standard deduction so no one takes it. If you do the whole "this area is my work space" deduction, you increase your chance of being audited. And then all the gains are wasted in handling that thing which is a bloody hassle.