Eh, I'm kinda glad that Obsidian is doing their thing with PoE and Tyranny. I've only tried PoE and it's a good game, though disappointing in some regards.
Either way, it would be better for Obsidian to make their own IPs instead of working as devs for hire.
That being said, we are forgetting that FNV is a decade old. The team that made it is long gone. Lots of key players have left Obsidian. Expecting another game of such depth and scope is maybe a bit too optimistic.
On the other hand, from what I've heard Cain and Boyarski's new game will be inspired by FNV a lot. In that regard, @TerminayChill has a point. As they say, good artist copies, great artist steals. We'll see how it goes. I just want them to do their own thing.