When to/Should we expect earlier seasons for Smallville/24/CSI/NipTuck/Supernatural?

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I have Smallville Season 6,7,8 on Blu-ray,Season 5 on HD-DVD, Season 1 on DVD. I have only seen the first a few episodes of season one. I want to wait till they are all available on High Def then start watching them. But it doesnt seem like studios are releasing earlier seasons on Bluray anytime soon

I have seen 24 seasons on DVD(sold them all in the anticipation that they were releasing them on Bluray) I want to rewatch them but in Blu-ray

I bought Nip/Tuck season four on Bluray. I have never seen any episodes from any season but I think it was a poor seller so no Bluray upgrade for earlier seasons anytime soon.

I ordered CSI season one on bluray. It should be here anytime soon but howlikely is season 2 and on releases in the next a few months?

Supernatural was a tv show that interested me but I refuse to buy DVDs (unless they are wicked cheap) and for me to start watching show they should release season one and two on bluray?

Maybe I missed a couple more tv shows with later seasons released on Bluray.

what are your thoughts?

Edit: Grey's Anatomy season four and five, Prison Break season one, three and four, The Unit season four