Hi,
There are already many ajax loading views in the core of HikaShop: checkout, add to cart, address manager, product edition, order edition, etc.
So I'm not sure what you mean.
The "grid / list view switcher" is something we could add but it actually doesn't require any ajax loading.
If you check how it works in templates adding it, they just change the CSS to have the listing switch between several columns of products and one column, and some other CSS to have either the elements of each product vertical, or horizontal.
We could add that in the future, and we want to, but it has nothing to do with ajax loading.