Yeah i am also intersted in the engine, apart from the new TT V8, will there be any upgrades on the others ? What about chassis technologies ? Will there be 4WS ?

There will be 4WS, 100%.

And I guess V12TT.

For sure, but i don't know when. Not in these early stages...

So, 750i is the new 408hp V8TT or that is the 740i? Which engine does the 730d get, the 286hp version, or that should be the 735d?

760 will come later (I saw the specific wood inserts for it)
750 and 740 are available in Li version from the beginning
730Ld half year later

Twin turbo diesel will take at least 1 year later (engine availability is a problem + 7 series buyers normally happy with 730d)

750 is new engine same as X6 (407 ps)
740 i don't know, wasn't listening at the time
730 same engine but now 245ps

I thought the 3.0 engine, as in the 530i or 130i has 272hp now.

So at launch the most powerful 7 will be 407hp 750i.

most probably the 740 will be the NA version of the new 4.4, there have been spy pics with data sheets inside that insinuated an NA 4.4, i forgot the exact terminology
so we will be getting a TTv8, probably tuned to s slither over 407, say 420hp
a circa 250hp 3.0I6, and a circa 320hp NA4.4
we can assume that sometime over the lifecycle the the TT engines (V8 and V12) will get power boosts, making the 735 viable within the range either as a 4th model slotted between 730 and 740 or as an outright replacement of 730

I think he talks about the 730D

Ooops, he does, indeed. My bad.