Re: "the Windows 7 hold-outs should finally feel able to make the upgrade"
Still using 7 on old machine with 4GB maxed-out-RAM and despite occasional problems with external drives it works well.
Also works well on netbook and the 7200rpm 750GB drive uses a lot less power than the old 250.
Interesting to note that I actually did try running 10 on both but it was just too slow.
Unless M$ are nice and reduce the price of 10 upgrade for older but compatible systems (maybe call it 10L) then people are just not going to move.