In one of the recent firmware updates, about the time they introduced the Kobo Aura, Kobo removed the cute graphic of the Kobo e-reader happy face that used to appear when the unit was booting. (There were other graphics -- a sleepy face, and so on -- that also used to appear as appropriate.) I have to say I really liked these -- they gave the device a personality -- and I'm sorry to see them go.
I know that the little graphic couldn't precisely match all the different Kobo models (some with and some without physical home buttons), but still, I thought it should be noted that it's gone. (I still get to see it on my Kobo Mini, which hasn't had a firmware update for a while, but it's gone from my Glo.)