Sous Vide has wonderful temp control.
Our induction cooktop has a really precise digital control of temperature, and a timer also.
I can see the advantage of cooking in the vacuum sealed bag (assuming you aren't transferring harmful toxins from the bag

) as it does seal in the moisture. We vacuum seal our BBQ in meal size portions, and have kept it in the freezer up to 12 months without any freezer damage. We had some corn that we finally threw out that had been in the big freezer for almost 3 years. It still looked good, but didn't want to take a chance.