Seems that the Windows 8 price is going to rise soon. Right now you can get an 'upgrade' for $40 (and perhaps even $15 - there was a thread about it somewhere).
I'd like to grab a cheap copy for the future just in case, but my Win 7 system is working fine and I have no desire to change OS right now.
So if I buy the upgrade, can I just download it and keep it on a disk for later, or is it one of those 'automated online install' things (which the world could really do without IMHO).