Will the Preview become RTM with a real key?

Hi,
I think I have read somewhere that a preview Win 10 install will become, though updates, an RTM version. If so great. But, again, if so, will there be a unique key that can be used to reinstall it on a clean partition on the same computer if it becomes corrupted ? Will that key work after year limit apply of the free upgrade?
Will we able to use the free 'upgrade' ISO to install on a clean partition, like we have been able to do in the past? I want to keep my installs of Win7 & win 8.1, and do a multi -boot system. Will the free iso install work if it is reinstalled after 1 year from release date?
Also I upgrade my system components often, What will happen if I upgrade my motherboard/cpu/mem because Intel likes to change socket sizes every other year. (when I do this, I revert all drivers back to those from MS, swap MB's, boot and let winX rediscovery all the hardware, then load correct OEM drivers)
Thanks

MS has released very little info to answer all your questions. If you do the free upgrade you won't be able to use the qualifying OS to dual boot. or at least legally. The free upgrade would also not be legal to use if you change the motherboard. The free upgrade is only good for the life of the computer.

Hi,
I think I have read somewhere that a preview Win 10 install will become, though updates, an RTM version. If so great. But, again, if so, will there be a unique key that can be used to reinstall it on a clean partition on the same computer if it becomes corrupted ? Will that key work after year limit apply of the free upgrade?

No the Insider Preview won't update to RTM version without using a qualifying Windows 7/8.1 license. Whether you'll be able to upgrade directly from the Insider Preview has yet to be seen, but Gabe Aul did say it was possible. As for the second part of that question; nobody knows yet as we haven't got there.

Will we able to use the free 'upgrade' ISO to install on a clean partition, like we have been able to do in the past? I want to keep my installs of Win7 & win 8.1, and do a multi -boot system. Will the free iso install work if it is reinstalled after 1 year from release date?

Again, we can't see into the future so who knows?

Also I upgrade my system components often, What will happen if I upgrade my motherboard/cpu/mem because Intel likes to change socket sizes every other year. (when I do this, I revert all drivers back to those from MS, swap MB's, boot and let winX rediscovery all the hardware, then load correct OEM drivers)
Thanks

If you upgrade the motherboard without a retail version of Windows you'll need to either use a new OEM copy of Windows or call MS and hope you get lucky with activation, this has always been the way. Whether it's any different with W10 is anybody's guess. Basically most of your questions can't be answered as nobody has got to that point yet.

heres the microsoft confirmed deployment choices (if it helps you)

Inject drivers? Better get hold of some syringes.