Agree with Cynthia and anticipate a growing presence of lotteries on the internet. Some countries already do this.
Ten years in the relatively short life of the internet is a long time and in 10 years the internet will just be leaving puberty. One presence in online casinos i foresee is that of Asia, probably China. China is already developing a new large scale Vegas of Asia (forgotten the name of this) in which the major Vegas casinos are investing heavily. China may like to censor its population when it comes to info, but i don't believe they will want to miss out on this major investment opportunity.
My other prediction is that casinos in 10 years will be catering more to impulsive consumer behavior in order to attract the public that otherwise may not be terribly interested in gambling per s. So, i foresee easier, quicker ways to get web wallets (or web wallets that are multi purpose), quick registrations and ability to quickly try out and play one game without having to go through the rigamarole of downloading huge casino files first. I also think that the whole industry will be well regulated by then, including the US