Like the above, visual-wise, the only mear changes are in the shaders, or Anti-aliasing.
From a very short amount of gameplay preview in the trailer, its safe to say it resembles its console counterpart. Even without most of the fancy shaders Killzone 3 provides, extra dynamic lighting etc.
Its not a handheld PS3 we have at the moment, more like an overly-amped PS2 on Pop-Rocks and Pixie-Sticks.
Now then, Story. While im not exactly hoping for a World War on a Portable Release since that's not exactly how it works, it has to be more underground, more behind the scenes. Playing as Mercenaries has to be the way to go in this case, might have been a predictable route, but its going to need a change of pace from all the Battlefield/Call of Duty explosion-fest-whahey that's getting tiresome. While your not exactly playing with any moral restraint since as a mercenary, your goal is to get the job done as employed. Doing missions/ side missions using the cash you obtain through kills, chain kills, brutal melee kills, objective completions, bonus objectives to get better gear such as Weapons/Armor/Gadgets and upgrades for all three.
Now as for Multiplayer, lets face it, there's no solid information on to what this next Killzone installment will give us as far as multiplayer is concerned. While it is essential for a normal release, ya'll have to think about what can be improved for a sequal. See this is what the Call of Duty series had an issue with. While they were aiming for an entire package of content loaded with tons of story missions, ops missions, multiplayer content such as extra game modes, perks, weapons, attachments, avatars, call-signs, flavored toothpaste, DLC, and last and least we forget..... zombies... eeeuuck.
While you can sprinkle zombies and some how get an investment back, its a rather cheap way to add to a formula that would have been better of if it were more paced. And with that being said...
Lets not ask for too much in the Vitas first Killzone Installment, while current releases are not as appealing as they come, its better off if we get the essentials, but more refined and polished.
Multiplayer should be a 6v6 installment at the very least, while supporting ranks with achievement unlocks for key points in multiplayer. While im not giving much examples for a lasting multiplayer game, its better to keep it polished with its essentials.
Polish is the BIG thing Resistance: Burning Skies lacked. While it had everything there to make a boxed sale, it lacked in refinement overall.
, but either way I'm sure I'm going to get my hands on it day one. 
