No, the 5200 didn't operate on a scanline basis, it was basicaly an Atari 8-bit home computer and I think that handled graphics very differently (much more advanced) then the 2600.
It had both the ANTIC and GTIA graphics chips just like the 8-bit machines, very powerful for that time. And definitly NOT scan-line based !
The 8-bit computer line feautured 256 colours and player-missile (sprite) graphics.
Yes.
But the hardware, while not near as low-level as the 2600, was still very scanline-oriented.
Heck, the first thing you do graphics-wise is upload a "display list" that tells the hardware what mode to use for each screen region, on a line-by-line basis.
I actually LIKE line-based solutions. At least for the time, they were far more powerful than full-frame ones.
Hard to say now, since there aren't any line-based solutions available anymore.
BTW, the 2600 had player-missile graphics, as well. It just only had 2 players and, IIRC,
onetwo missiles(which makes the wide variety of 2600 games that much more impressive, particularly object-heavy titles like Space Invaders and Chess).
And PM isn't QUITE the same as sprites. There's some odd diffrences between conventional sprites and the PM setup, not the least of which is the missile sub-object.