i kniw youve done system combos in the past, but what if you made a magic playstation box, that could play ps1, 2, 3, AND 4 games?! I was thinking that you could either use an original fat ps3, which plays all the first 3 playstation generation games, OR, you could use a super slim ps3, which plays ps1 and 3 games, and a ps2, (if you do this, use 79000 series, way smaller motherboard) and of course both would use a ps4 slim. Some other optional challenges for you include

 

-seamless integrated disc drive(only one disc slot)

-as small as possible

-as seamless console switching as possible

-one hdmi out

-one controller

 

 

i really hope you consider this challenge!