Welcome back TBird . The same as you, took a year+ off and starting to get back into it, my carputer has been running the whole time but there was nothing new so I stopped spending money Not a lot has changed really.
Faster Mobos and processors -Dual Core, ITX 1.5 - faster stronger and reasonable power requirements.
Larger PSUs to handle the newer processors/boards
err that's all I can think of. Was really surprised and disappointed to see no real movement on the LCD front when I came back about 2 weeks ago.