Blame it on the people that bought CoD:WaW. They keep doing this until sales drops.
My only interest in this game is for the Rio de Janeiro map and city that the game should have, since I from am rio de janeiro I want to see how the city will look.

Don't. Care. About. Graphics.

If I want to watch something pretty, I get a movie. If I want to play something fun, I get a game.

COD4 had a very compelling single player.  It's one of the few games that I played through on a higher difficulty.  There were some truly moving moments in that game.  The first time the nuke exploded was one of the only "oh shit" moments I've ever had in video games.  You can't say that didn't affect you.  The interactive ending with Captain Price sliding you the gun was also great.   And hardly any first person shooter could be considered "non-linear".

Edit: And COD4 doesn't have trophies.

it's for consoles mainly, it's not going to get too much better at this point unless it's an exclusive project in the making for at least 3 years, which it's not. you want MW2 to look better than on the HD consoles? easy, gaming PC, otherwise, I'm just going to say "cry me a river."

The game looked fine and still looks fine. It's a multilayer engine. If you are seriously concerned about the graphics of a CoD game, you should play a console shooter that actually does strive to look cutting edge. Killzone 2. The game play is incredibly similar and has just as good of an online system.

The issue is, CoD is more fun. And it will remain fun.

The engine looks fine. WaW was the series milk, I assure you MW2 will be a fully fledged title.

As long as it brings COD4 experience + MORE I really don't give a f***.

If you liked it then you must have low expectatios, the game was hardly fun,being a bad ass soldier but cant hop a lil fence,if they fix the hall way shooting and unlimited AI respawn then yes ill like it,oh and give me about 20 more soliders on my team and 20 on there team and that will make a epic war not some paint ball knock off. (4 on 4)

@ justin
the single player campaign was boring as shit, i tried to beat it but after 3 months and just getting through the black and white copter part i just quit, it was a total snooze fest. I had read about the statistics before but I thought it was a much lower percentage than the 45%. If that many finished it, then more power to them. They have greater perseverance than I do. On a side note, I would imagine that the number of people that game has gone through is much higher than the number you gave, which would put it at around 11-12 million. I believe activision said they sold 12-13 million people or so. I am one of those who bought a used copy, and I'm sure there are millions like me, so your percentage must be much lower. I actually just sold my copy of this game...for more than i purchased it if i might add :D

on a side note, its not just about the simple fact that the graphics are the same, its more so that there has not been enough growth is why i am not buying this game anytime soon, but may do so later on when the next call of duty is announced. I just can't justify paying full retail for this game and close to retail for that matter

The Modern Warfare brand is about gameplay not graphics.