I prefer that my devices do an
outstanding job of their primary task.
That does not preclude that they
can perform other functions.
My Mobile makes/receives voice calls (and I can't even see who is calling if outside during the day, so forget reading)
My e-reader displays books for WEEKS, even in bright sun but won't do movies (or color

. but who cares, I don't usually read comics.)
My computer does best for reading and posting to MR
Movies are best when displayed on a flat screen better than 20 inches.
To that end, Letterbox/widescreen, the way the director intended it to be seen.
And a Sound system that can kick butt, without being
Loud whether it be for Movies or Music.
Ages:
Main speakers: 50 years old, 40 years old (2 systems)
Amplifiers: 10, 20, 30 years old ( 2 systems, 1 was Quad)
Truck: 18 years old
Car: 11 years old
Computers: average 8 years old (many parts reused

)
DSL: Replaced 10 year old ISP (and their slow Modem)
TV: Last update to accept DTV broadcasts. Previous 10 years old
e-reader: Passed on the original 3 year old one, using the
Spare PEz
Mobile: recently replaced 4 year old with a broken antenna/weak battery
Most get replaced because they
finally stop working and the repair would be half the price of a new system with a fresh life expectancy.
Longevity is important to me.