Whether it will become good or not still depends on the quality of their product. If they can maintain the quality of their previous product, then I don't see anything wrong. After all, companies venturing into another business line is common for big companies. They won't even have to start from scratch in marketing a new one because they already have the name.
It is possible that the weight of a name can be transferred from an established brand through its feature products but, that’s largely dependent on quality. When you are known for the quality of your products, your future products would inherit that trust but, it’s most unlikely that you would be able to prefect the production of all products to be of top quality. When it’s not your field, you would definitely be lacking in some trade secretes and not meeting up with required quality assurance test would mean, low quality and that would reflect on your brand.
