That's Windows specific, I understand the frustation and I am sorry you have to live with that. Every time I boot back into Windows I get harassed by updates and reboots. I don't miss it.
The Ubuntu update dialog is unified and has zero risk of tricking less savvy users into installing spyware. I'm sure you've seen Windows machines with five different updaters popping up at boot, competing for attention (e.g. Flash, Java, Apple, MS Update, MS security alerts, etc.)
I'm actually not the one who made that comment. My mention of spyware was in reference to the Ask toolbar installed by the JRE on Windows. Installing such things is not a normal part of the Ubuntu update process.
I've mentioned elsewhere ( https://news.ycombinator.com/item?id=8285065 ) that I really don't mind Java, and FWIW I have liked the Jetbrains IDEs, but the consumer JRE installation and update process is really quite bothersome.