Gear, to me, is the stuff I wear specifically for exercise/ outdoor tasks. For me, that includes: ice skating, running (trail or road), biking (indoors or out), weight lifting, gym classes, hiking, snowshoeing, yoga, etc.
In my 20s, 30s, and even 40s, I would have been right there on the couch with Jenni and Jenn as much as possible! I did not enjoy most active pursuits except for urban walking, which required no special clothing. Things have changed. Nowadays, I'm more engaged in sporty or active pursuits.... even though a part of me would still always prefer to be reading the book. (Audio books and great bluetooth earbuds have made me a very, very happy hiker! As has the appropriate gear for the activity. There is no bad weather. There is only inappropriate clothing.)
Having said that...I like to keep that clothing restricted to the activities it's designed for because my core style is not and never has been sporty. As Gaylene and Carla also said, I like to compartmentalize a bit. I feel better -- in regular life -- not wearing clothing designed as gear.
The items you showed look like loungewear to me, not gear. (Waving to Janet.) I might enjoy wearing those at home on freezing cold nights...cozy wear. Good book reading wear, maybe! But not true gear and not my usual style. But it's all so personal. If someone chose to wear those items out on the street I wouldn't think twice!