The online browser based PSN store has gone live for US, Canada, Mexico and Brazil, whilst the UK store has been online for a while. Other regions are expected to follow soon.
Using the browser PSN store, you can purchase games and apps just like you would on your PS3 at home. Although, you are unable to make your PS3 turn on and download the stuff for you, instead you are required to go to “My Downloads” when you reach home to download it. This marks a huge step for on the go purchasing or browsing.
However, without the option to turn on the PS3 and download the merchandise, all the browser-based PSN is really good for is browsing stuff, purchasing would have the same result as doing it on the PS3 as you would have to download it regardlessly.