Hi in my getting Hi-Def or Blu-ray on my 38'' HDTV with 768P???

[Αδάμ]

Hi I do know that 1080P is the best true HD picture. I have Philips 38'' HDTV/LCD with 768P & PS3 with 40gb on my bedroom. When I watch Blu-ray movies my 768P HDTV, in my getting Hi-Def picture or "Blu-ray" picture? Since I do NOT have 1080P? Thank you.
I am also using Philips HDMI cable too.