You've left out two of my all times favourites.
Johnny Depp - 21 Jump Street; and
John Travolta - Welcome Back Kotter
True, there are tons of actors that started on film that solely do film now.
There is another notable one who started in TV, earned Oscars and then went back....
Sally Field.
And there are others that are even bigger stars now that started in TV:
Russell Crowe and Hugh Jackman both had parts in Austrailian TV prior to hitting it pretty big in film.
Russell was on several TV shows, even as a kid (his parents were set caterers when he was a youngster) and he's won an Oscar and been nominated several more times on top of that.
Being in TV isn't automatically a death sentence to an actor's feature film hopes.
It just has to be the right actor getting the right part.
Maybe Tom won't get the right roles for him and he'll have to retreat to only directing and producing, but I really think he's good looking enough and talented enough that he'll have some kind of career in film
Hollywood is a business. If producers think Tom will put butts in the seats, and he will (I think the only reason The Fog made money was because Tom was in it, that film was pretty bad), they will put him in front of the camera no matter what the few naysayers think.
I think it's thinking like that is the only reason some terrible actors keep getting parts, but I won't name names. *cough*Sam Worthington *cough*
Although, it's worth mentioning that he's another actor who started in TV.
Major film actors who started in TV (or worked in TV early in their careers) that ended up doing pretty well:
Meg Ryan
Demi Moore
Burt Reynolds
Clint Eastwood
Robert Downey Jr (didn't start in TV, but has made major guest appearances on several shows)
Bruce Willis
Tom Hanks
George Clooney
Leonardo DiCaprio
Gwyneth Paltrow (did a few TV movies early in her career, making a guest shot on Glee this season)
Jennifer Aniston
Gerard Butler
Pierce Brosnan
I could probably find more, those are the ones I could think of off the top of my head...