I’m fully aware of that also, but I the features you want won't really change.
The options technology options available will develop not change, in two year time anything new will be too new and not standard.
This is why I'm looking at things like Linux for MCE.
In two years time there will be a lot more than one developer registered on sourceforge with this project and, I would hope, there'll be a lot more than just 3 distro’s registered under the media centre distro category!
Some of the key things I’m after discovering from this exercise is that:
One central server with thin clients appears to be the way to go.
10 Gig Fibre networking will mean that very little processing will be needed at the client side, in the key rooms in the house which would need HDMI type media,
In another 5 yrs time there may not be a need for the server as it may just stream straight from the net,
The thin clients of today will be the PDA of tomorrow so a lot of the thin client may be built into each device, as in the TV will come with a network connection ready to be assigned an IP address.
Wireless is getting much bigger each year so maybe a fat client using something like p2p to share media across the network will also be an option,
Power for your computing needs will be separate from the house hold appliances as these could be one a separate line which would be connected to a low voltage alternative power supply,
Really interesting is my conclusion at this early stage!