Intel-powered Android tablets can run almost all Android-ARM apps. Those that are native ARM apps are handled through binary translation. It works very well. I've used a Dell Venue 8 (Intel CloverTrail+ Android) and did not find any apps that wouldn't run just fine.
Is that done in hardware? Is there a performance penalty?
A related question about the programs you tried: were these computationally intensive games, or things like office apps and file managers?