Streaming high quality video is still a tought thing to do. For those with DSL, cable or other broadband connections it works ok but for others, not yet.
I work for a company that manufactures and sells computer based video and graphics eqipment. We are soon to release a streaming product and have done some VERY high quality streams. Unfortunately they can't be watched on a 56 k modem ;-(
BTW, I was recently at Colorvision doing some training and they have our latest products, so will most likely be at the forefront of streaming when the bandwidth issues improve.