A few moments ago, gaming website The Gamer reported that most of the available PlayStation stores will close their doors in just a couple of months. The article reads: "According to a source familiar with the situation (verified by TheGamer), the stores are due to be closed down from July. The announcement is planned for the end of this month".
Regarding the dates, the PSP and PS3 online stores will close on July 2, while the PS Vita one would remain open a little longer, until August 27. But what does this mean? It means that you won't be able to buy digital copies of games or DLC anymore. You'll only be able to purchase physical copies or play what you already own.
So, if there's a PSP, PS Vita or PS3 title that you always wanted but never bought, now might be the best (and only) chance to get it.