The computer integrated training bikes with built-in SRM's and are awesome. Same with the computer integrated turbo trainers that use your own road bike.
What makes them awesome?
Their computer enhanced ability to take you mind somewhere other than your garage, loft, basement or office. Racing other riders...riding famous courses...seeing at least some CGI scenery go by...awesome IMO.
Other than the screen in front of you, it's still sitting in a room somewhere with the cold, windswept, snow-covered road still outside your door.
Yeah, for numbers freaks, the Wattage and RPM and fake VAM and a dozen other numbers that are output give the user something to crunch and analyze, but those can be generated in a bunch of electronic devices and trainer units nowadays. Those numbers might help take the mind away from the brain numbing 'ride' any indoor trainer provides for some. For me...not so much.
Until I decide to get that sweet Tacx iGenius multi-player virtual reality device, I'm making due with a 20" box fan and laptop full of DVD's and race clips with my Stone Age technology rollers and fluid trainer...sad and pathetic winter existence that it is...