He cannot find his way around the house anymore and truly believes we are only visiting a strange house in a strange town. We have lived here 30 years. Other than that, he knows everyone and remembers details of our life. Anyone else having this same issue?
As Sam said, find out as much as you can from his doctor(s) about the details of the damage done, so that you can prepare for what lies ahead.
It's not just memory, it's executive function, ability to understand where the body is in space and how to move it, all kinds of things the brain does that can be affected by a stroke. It can also kick off or reveal vascular dementia.
Did he do rehab after the stroke? If not, see if he can get into it now. Most of the recovery happens in the first few months after the stroke, although the brain can repair itself by using other parts of the brain to work where the damaged parts did the work before. But most of the time, the stroke starts a downward trajectory that can last years or decades. That's something to prepare for anyway, but now that your husband is exhibiting signs and symptoms of brain damage from the stroke, it's more of a priority.