What's our speculation in terms of how the TiVo Edge would differ from the TiVo Bolt? Other than having a chipset that's a bit faster (and better at transcoding), I can't really think of anything else it might have. Dolby Vision? I kinda doubt it. An updated Vox remote with no thumbs? Seems likely but hardly anything to get excited about.
The only thing I can think of that would make a significant difference is if this box runs TiVo's customized ("Operator Tier") version of Google's Android TV, the way that the STBs in the TiVo Next-Gen IPTV Platform do. Having that platform would allow for much more robust app support. But a key question is whether (or how easily) CableCARD can be supported within Android TV. I'm not aware of any devices that run both (although some may exist).