Is this system upgradable, or a new PC better?

[Skorpian]

Thanks for the advice guys. So, if I'm gonna stick with this monitor for a good while, will that system be enough? Like a DDR2 and an E8400 are ok?
If I get a new monitor, I'll be upgrading my GPU if I run into issues.

 

[PP Mguire]

If you go 1080p you would need pretty much a full upgrade.