If it doesn't lock in data access like MS Access did, it could be seen as just an interface designer. Whatever data it gets fed, could be migrated from a simple database to a proper backend if such need arises. It could even coexist with other front-ends.
As long as it doesn't let too much business logic to be programed into it without a simple way to extract it, it shouldn't be a problem.
The problem isn't that Access locked in data, it was that people stuck with MS JET engine instead of hooking ODBC server properly - then Access became a funky, useful UI tool for databases.
The default datasource is a regular Google SQL server, so if you want to change something later on, just plug the DB credentials into your new thing. There's no lock-in.
