I'm looking forward to this slew of HD remakes.
In the case of ZOE and MGS I sold most of those titles long ago so its a good opportunity to pick them up as new without playing ridiculous prices and having them look decent on my HDTV. I just barely touched Ico and haven't played any of the Splinter Cell or Sly Cooper games so its a good way to pick up several games for a new price on one disc.
If feel like these Collections might somehow diminish the value of your personal collection then your not collecting for the right reasons. :/