Most are system-on-a-chip implementations with only okay compatibility. Color palettes will be slightly off or sounds will be a slightly wrong pitch, won't support all carts, etc.
Your best bet for playing your games on a modern screen is to get an FPGA based system, a top loader NES modded with HDMI output or simply use a cycle-accurate software emulator on a computer.
I noticed yesterday on Steam that a game I was interested in had a much higher percentage of negative reviews from its Early Access days. Since there weren't enough votes overall to offset these negatives, it really hurt the game's overall score.
Apologies. I was fatigued from a World Tour.
He got Pac-Man Fever and went on a murderous rampage
Good! Good. Let the Linux flow through you. It makes you powerful!
I don't understand. We just need to gather the dragon balls and he'll be back in time for dinner.