The wheels are essential for moving the house around, so that's definitely a feature most houses don't have.
Owners of tiny houses have unique requirements. If you're traveling with one, you have to be aware of bridge heights, how to access utilities and where you can park one. Here are a couple of sites that address those issues:
The ones below are in a vacation area and are (I'm assuming) rented out as cottages (the kinds of buidings that I've seen for years in northern Wisconsin,). Technically, they're not part of the tiny house movement, but I've included them just because they're so bright and pretty.
More realities on tiny house living:
I'm always fascinated to see how the interiors come together, as in this video:
Here are some really interesting ones.
I don't think I would like to live in a tiny house, but vacationing in one could be fun and interesting.
Have a great day!