Digital voice cloning is fairly harmless. It's when they start programming the outward personality of _X_ individual that issues of
digital immortality enter the fray.
Such will be a one-sided or fragmentary depiction unless multiple people contribute to the construct, who regularly interacted with _X_ over the years. The private identity of _X_ will not be captured to much degree unless they left behind a lot of journal notes concerning their internal thoughts and tendencies (Sylvia Plath would be a good example of that).
In the future, _X_ will simply incrementally formulate and update their own postmortem replacement. There will likely also be bias inherent in that due to _X_ desiring to leave behind a more idealistic template of themselves, sans the flaws or whatever habitual shortcomings self-irritated them. Narcissists, OTOH, might be far less tormented in that respect -- but also deficient in inferring how other perspectives perceive them (any of us have been assessed as an overall sphincter to somebody we interacted with once or several times in the past.)
Digital immortality becomes "ghost-like" when the replica personality is embedded in a domestic or business environment -- part of an AI system regulating an entire house or company edifice, along with connections to robots, display screens, appliances, and tools. "Haunted abodes" will finally be instantiated. Since ghost legends are somewhat already renown for only exhibiting limited behavioral and psychological characteristics of the original human, incompleteness and superficiality of the "resident spirit" will be less glaring in that recreational conception of "what's going on".