Sony teasing PocketStation to make a comeback

PocketStation is back, at least according to a Japanese teaser with a reveal set for next Tuesday. The original riffed on the Dreamcast's VMU with an LCD screen, buttons and a memory card, and made good use of Sony's mascots Toro and Koru. 

However, we don't use those big old cards now, so Sony must have some other 'in' to attract buyers. Simple micro-games won't cut it, so what would Sony have planned? Does it link to the Vita or is it something Sony might but on its smartphones to try and further spread the PlayStation brand.