"It's from a functional perspective that the store will undergo its biggest changes. The search function is now smart, so provides a reductive list of options as each letter of the search phrase is typed," the site notes. "Abbreviations and misspelling will also be covered, allowing users to search for 'MW3' or 'Mas Efect'."
PS Vita and PSP receive two separate sections, with PS Store product development manager Elliot Dumville saying a majority of PS Store users search for PS3 content, so partitioning mobile and home makes sense.
We'll have more when this is revealed Stateside.