(And yes, you can't run x86 Windows-binary games, but that's true of any non-x86 system. But you do have access to any of the many open-source games out there, and some mainstream game companies like iD Software even support Linux users.)
Yeah, but those ID software games are x86-only binaries, right? Like most proprietary linux software is. So you won't be able to run them in a X1000. This is the thing about Linux: It supports 96 different architectures, fridges and car stereos included, but if you go with anything other than x86, you lose whatever little proprietary software there is for Linux.
