It's good enough for watching videos, but for working and reading text, I personally haven't used a device with high enough text quality to prevent eye strain.
I'm very bullish on AR though, and I'm willing to bet that consumer grade devices which are genuinely comfortable to work in will become available within the next 2-3 years.
To me, AR is the next step in Human-Computer Interaction while we wait for full BCI (Brain-Computer Interface) devices.