But is it boring *because* of being 1st person and open world?
No. It feels boring because I've already done it in Oblivion, Fallout 3, and Fallout New Vegas and to a degree in Morrowind. Like I said, the core gameplay is the exact same, and because the amount of content to crawl through is exhausting (which can be, and is in some cases, a good thing) and the same gameplay and more or less same content the earlier games had, it feels more like a chore to go through the same thing all over again (after the initial impact).
The scenery is nice to look at, the technical improvements are very visible, there is maturity to the lore behind things that happen, but it is just another Oblivion gameplaywise - a ton of dungeons and quests, 90% of which involve dungeons, and feel kinda silly and/or detached just like Oblivion and just like Fallout 3.
There is no reason to reinvent the wheel all the time, and I'm not upset that Skyrim is like it is, but it might help to change the tyres once in a while. I do not want Fallout 4 to be "the same already played game" with few technical improvements, even if it is going to be a open world FPS.