Hmm. Right-click on the Show help button in NetSurf posted my incomplete message!
I can't see anything that an Iyonix or A9 can do for me that an old computer can't. I would pay for the ability to edit digital video from a camcorder and generate DVDs. I would pay for the ability to watch YouTube videos and DVDs (in which case the new computer might replace my DVD player in the living room). I might even pay for the ability to watch and store DVB-T transmissions via a USB device, but I already have a device that does that (Siemens AV740).