Higher definition security cameras?

I have just purchased and set up 3 cameras at my home.  I have the Outdoor wired camera and 2 indoor wired cameras. 

The sound tends to be low quality, and its very hard to hear some of the sound that the cameras pick up and record.  I hope in the future Roku can improve upon this.  However, what I am noticing with the 1080p camera recording is a lot of what we are seeing tends to be a bit grainy.  Will Roku ever have high definition security camera's available?  I think Roku has a high definition camera doorbell, but I didn't see anything for a high definition indoor type camera.