Heck, I've seen much larger banners on a variety of colored backgrounds, some with animation even! I think you're just easily impressed.
I actually thought that site was pretty impressive - I'd love to have animated traffic graphs on satellite maps. fantastic stuff. Admittedly the least impressive applications to me were the Microsoft ones.
Not sure if I 'wished [my] amiga could do that' however I wish something would make computing fun again, like it was with the Amiga.
The Mac doesn't cut it. It's fantastic, easy to use but I don't enjoy it. I use Debian Linux because it works, and Windows because I have to but I still fire up the A4000 when I want to remember what a fun computer felt like.