This is the type of mentality that is slowing the internet down. Like people who "dumb" down their code to accomidate people with older browsers or slower connections. Why stifle our creativity for people with lesser technologies.
So making sure that something fits everyones needs is slowing down the Internet and dumbing down code? Here is a news flash for you, the majority of the people on the Internet are still using 800x600 and are still on dialup. I think you need to check your facts before making a statement like that.
If you want better themes then I suggest you learn how to do them yourself. There are plenty of resources out there to help you learn.