And besides, if you want to start writing your own browser to compete with the big guys, do you want to pay $6.5 million? Or even $1,000? This would effectively cut out grassroots development of anything that could compete with the big boys, wouldn't it? That alone is worth not having the "feature".
The licensing isn't as simple as that for the guys writing their "own browser" as they are not forced to simply fork over any monies, it by no means cuts out grass roots development and shouldn't scare anyone away. As a small "grassroots" company I spent a bit of time digging into it and called MPEG-LA, they were actually more reasonable then even my best guess and told us to toss the licensing fees we thought we might pay for H.264 decoding as they aren't required due to our implementation.