I can't fully remember Kovacs history but I suspect it's not so much to do with life extension as his having been killed several times over whilst he was in the Envoy Corps: "Coming back from the dead can be rough. In the Envoy Corps they teach you to let go before storage..."
Yes I think you're right I do seem to remember something along those lines.I think the books say he lost his real body when he went to long term prison, his mind was put on the shelf for many years before the first book.
Maybe I'm biased by his Japanese form, because book 2 add up so much to his past, especially when he choose to wear a top-class Japanese combat sleeve. Outside of him, I'm most interested to see in this one the hotel Ai. And then Bancrofts. Plus all those awesome fights.
https://io9.gizmodo.com/altered-carbon-asks-can-humans-handle-becoming-gods-1821556381Netflix’s Altered Carbon looks a hell of a lot like Blade Runner. That isn’t a surprise—after all, Blade Runner is the father of modern cyberpunk. But Altered Carbon is something all its own. Because in the new scifi series, the biggest threat to humanity isn’t artificial intelligence—it’s immortality.
Their "souls" or whatever you want call their "human essence" could be, because you can body-hop forever if you are wealthy enough to do so, or have a corporate backer. It isn't "immortality" though, it is more like retreading old tyres.It has been a while since I read the book, but I seriously doubt that the sleeves are meant to be immortal.
That was my understanding of Altered Carbon's "immortality".