Tons of companies are developing blockchain solutions for internal needs, now the question is do they use an off the shelf solution like Ethereum and do a token based on it or an completely independent blockchain.
I think ethereum could be more useful to them then using the blockchain because this is what vitalik made it to do essentially focusing towards the business sector.
But with target using it for their businesses infrastructure could make it more efficient with increasing their current productivity in the long run. As larger companies such as costco and walmart have a wider customer base then they do so they need to work in other ways to regain more of the market in these sectors.