They don't need a hardware revision with Vita, just 16-32gb of onboard memory. Though I did read that the reason Sony's memory cards are priced like they are, is so that retailers have some high profit accessories to sell with the consoles to encourage them to actually stock Vita in the first place (with the push on digital, retail has no incentive to push the device at all).
I read somewhere that 50% of memory card price is pure profit for the retailer.








