I agree the inferior gray-scale font rendering that IE11, other bits of Windows 8 and Office 2013 force upon the hapless user is eye-sight damaging.
I suspect lawyers won't get involved until some large organization rolls out Windows 8 and then gets hit by multiple workers compensation claims from employees with damaged eyesight. Then the organization's workers comp insurer will sue Microsoft.
Trouble is, a huge number of organizations have just upgraded from 10 year old Windows XP corporate desktops to Windows 7.
Most of them will not budget for another upgrade for at least 3 years. Some will even think they can make Windows 7 last 10 years like XP did.
So, we might not see any improvement until:
a) Windows 9 arrives or
b) Cheap Ultra HD 3840x2160 monitors become available.