This is true and welcome. But the stock browsers will be how the majority access web apps (until there's an absolutely huge gap in features and performance like IE when FF hit the scene, but that will be years in the making.) The point is that Google shouldn't rest on their laurels because alternatives exist. If that were the case, we wouldn't have any Google products.
On android, you can use alternate browsers. If google doesn't improve the built-in browser, something like Firefox can displace it.