Well firstly Tizen can have native apps.
I do agree with you on it not working on Symbian though. Possible, maybe but ****ing hard.
And for your last comment in the resources it uses, take a look at wine. Completely different program I know, but it did it. Almost no lag.
Also Android is only a Vm on top of Linux anyway, that's why it can be ported and run in full speed.