TV - Wouldn't give a jot. Wouldn't make any difference so would do much the same as I do now.
Laptop - haven't got one
PC - I would have to go to the bank, go to the post office, pay bills, write letters, telephone more people and visit the library more often. Probably be better for me, but I would miss it.
The TV is going after my youngest leaves home so no loss there.
I suppose if I didn't have my friends on line to talk to I would read or go walking.
Draw pictures, make cards, do cross words or suduko.
Listen to my MP3player.
Go swimming, do house work..........