nice idea, but unfortunately I do not see this becoming 'big' for a couple of reasons. For instance, even though one can buy LEDs advertised as having a 'warm' colour, the light produced is still rather harsh compared to halogen for instance. Most people do not want an entire house, or even a single room, lighted purely by LEDs. Same goes for the colour: on paper it's nice to read that colour can set a certain mood and such, but is there really any practical use? Who wants to sit in a blue/green/red room anyway? Another factor is that it seems to be a small subset of an actual existing but practical system: current domotica systems can be controlled by your smartphone, by a pc, over the internet, you name it. And there are already dozens of them.
My bedroom is lit by LEDs and it's fine. I also use a big 17W bulb as a table lamp and it's often the only light I have turned on in my apartment. It works almost as well as my big 6x40W halogen fixture. (Though obviously the halogen light is much brighter, there is "enough" light either way for things like walking around, getting dressed, etc.)
The only problem is that I think the color rendering index must be pretty bad. When I'm only using the table lamp, everything feels black-and-white like it does at night under sodium lamps.
I otherwise have a bunch of halogen lights, and they aren't that great either. I'm beginning to think it was a little early to ban incandescent lamps.
The poor color rendering is what the comment above you is talking about. If a bulb makes your wood walls look funny and the picture of your girlfriend on the desk look like an alien, it's not going to go mainstream. Especially if it costs $50.
Mike Herf (of Picasa/F.lux fame) wrote some articles when CFLs were going to solve everything, you know, three years ago. Applies to LEDs as well. His wife is a painter. Let their struggle be your guide: