Sounds legit. On the other hand..his kids are as big as they were when he left them. How is that possible? It was a few years between and children grow in that time period. Yeah I know, the kids didn't grow simply because they shot the movie in a few months.
But it would've been better if he'd wear the ring because then it would fit perfectly together. And it would be more philosophical..like, can we be 100% sure that right no we are not dreaming/in a Matrix-kind reality. No we can't. Would've ben better in my opinon.