You mean https://solanamobile.com/seeker ?

All of the copy seems to be built around Solana, "Web3" and crypto. It doesn't seem to have any appeal outside of that. It's not clear what the software even is. The docs [0] seem to indicate it's just Android, with some SDKs for interacting with the "Web3" stuff.

This isn't a "serious attempt at creating an app store that can compete with apple or google", it's just another "Web3" project. It's exciting to people within that ecosystem and utterly uninteresting to anybody who isn't.

0: https://docs.solanamobile.com/get-started/development-setup