I've got an email with such a subject lately. Initially I understood it as "We're reading your mind" and it really impressed me as the email was showing different portable batteries for smartphones I was willing to buy last week.
Only a few minutes later I remembered the fact I was visiting their website for those products earlier this week, and the fact I've bought from them a year or two go. So what has happened here? The website has seen their already existing customer browsing for some specific products. He remembered that fact and followed up the customer with an email about those products hours later.
In fact that's a very similar email to abandoned cart follow up, but based on product pages views instead of things put into cart. And it's pretty effective in the era when many of our purchased are based on price but not seller reputation and sometimes customers don't remember their brand at all.