It's difficult to see how they can have a future together. They've been drifting apart for some time, and it's unlikely that a few more power cuts will be enough to get them talking again on a permanent basis.
More importantly, however, is the matter of trust. By revealing the gender of their stillborn child, Shukumar devastates Shoba; more than that, he betrays her. He knows full well that she never wanted to know this information, yet he still goes right ahead and tells her anyway, as he no longer loves her. If Shukumar no longer loves her, then it's difficult to see how the marriage can possibly survive.
For her part, Shoba reveals that she's signed a lease on an apartment so that she can have her own space away from Shukumar. It's perfectly clear that Shoba has already separated herself emotionally from her husband; all that's left to do is the physical separation.