This is not a good decision and it will downgrade all new items and promote old items only. So here are effects that will happen:
- User will see same list in search as in the Popular Items menu
- If a user want to search for a purpose than he/see can see most of items from Popular Items
- New items will be highlight for some days when on homepage. There is no way to see new items
- User get bored by seeing same items everywhere. This will effect in long time.
I strongly suggest to change it to Newest Items so new items can be promoted.
Even if you like to keep it than I suggest you to add new ways to promote Newest Items too. Here are some suggestions:
- Add new link in menu for NEWEST ITEMS below POPULAR ITEMS.
- Add a search box on homepage specially for newest items.
- Add a dropdown after search box with default to Newest Items.
- Find ways to help and promote Newest Items too.