Taking into account mobile devices represent a significant part in today’s web traffic: Is it obsolete to use a mouse pointer in a logo of a company?
UPDATE [ADDED REAL EXAMPLE]:
Simplicar is an automotive e-commerce site for affinity groups just like TrueCar in its early days. It is somehow creative because the mouse pointer replaces the door of the car.
Is it obsolete to use a floppy disk to represent a “save”?
Icons and logos don’t need to be literal, the important thing is communication. If a mouse pointer conveys the meaning you want it to then there is nothing wrong with it. Even if mobile web browsing is overtaking desktop browsing, very few people will be unfamiliar with a mouse pointer. Maybe in 10 years everything will be touch-screen and mouse pointers will be obsolete, but even then there is a chance that it will be symbolic and understood (à la floppy disk), but now I’m sure it would be understood.
I don’t think using a mouse pointer is necessarily a good idea for a logo, but not because it’s obsolete. It’s an unimaginative, uninteresting cliché—that’s not to say it couldn’t be used imaginatively, but certainly in the stock examples you post, it isn’t exactly inspiring.