^^
Are you saying MGS isn't HD?
Also, thinking about it, this topic is a little silly IMHO. If we're talking just technical graphics comparison then really you need to actually understand graphics to knowledgeably comment - but WTF it's the internet, let's just go for it.
EDIT : Darc Requiem not saying your comment is uninformed, it just got me thinking that really unless you know your stuff about resolutions, etc. then any opinions are just uninformed opinions. I thought both MGS4 and Gear 2 were 720p native, is MGS4 a different resolution? Coming from PC background I tend to find knowing this stuff a pain on consoles as the box sure doesn't tell you and it's not like you have a drop down list of supported resolutions to chose from.
Try to be reasonable... its easier than you think...
