Little is good
Google may be going to far if they decide to give multiple search results for videos, images, webpages etc. all on the one page.
Currently the nice simple design and good search results is what keeps me and everyone else coming back - unlike Yahoo and MSN I am not inundated with crap I do not want to see. If I want an image I click the images tab and do a search from there, if i want a video I just type "video" next to my search query. If it's news I am after then the News tab does it... It's clean simple and nice.
I am hoping they don't go a step too far in their quest for dominance and spoil one of the aspects of Google which keeps people coming back, they may have complex algorithms working for us behind the scenes but its the simplicity of it all that everyone likes.