Compared to diminutive, proprietary HA touch screen PCs and panels (eg $1400 for a 'dumb' 8" Cortexa touch screen
An upgrade from a Home to the Ultimate edition of Vista, and a solution to the HD-DVD/Blu-Ray debacle, would make it more attractive.
I write this having chased the elusive solution to a large touch-screen, dependable-as-a-$50-B&W-TV + PC + HA interface/controller for years.