Things might change in nearest future
If instant off-chain transactions come about, there won't be any single reason to use the blockchain for so trivial things like buying a cup of coffee or tea (what you like most). That's I expect a tremendous boost in Bitcoin use all over the planet once these transactions become a reality. That will be a major milestone in the Bitcoin story. And that's also the reason why miners are heavily objecting to these transactions even though it should be crystal clear to anyone with a half working brain that instant payments will be a real breakthrough for Bitcoin ecosystem
I use a shift card for about 90 percent of my transactions, so while I'm using a debit card, technically it's bitcoin. So even on chain, I'm buying pretty basic shit already just given the fact that spending the Bitcoin is so much easier now (had this been a few years ago, I would have been relegated to selling the Bitcoin, or using giftcards purchased with Bitcoin.)
I'm afraid this is not quite so
When you buy things with your Bitcoin payment card the transactions you make certainly don't go to the blockchain. They are internal transactions, i.e. the company which issued your payment card (Coinbase in this case, if I'm not mistaken) just subtracts bitcoins from your wallet (according to the exchange rate it sets at the moment you make a purchase), but these debits will never appear on the blockchain as such. It is essentially the same when you transfer funds from your web wallet account to another account in the same web wallet. The funds are not moved anywhere (in fact, they are not even in your wallet if you check the wallet address, for example, via blockchain.info), and the changes in the balance you see just reflect the changes in the internal accounting system. You can easily see that the balance of your wallet on the blockchain is actually 0, while in your web wallet as it is shown to you it is not