So it should work OK and while AV and so on Software is always recommended many people currently are not using this type of software on this platform.
As to what will happen when you install and use this type of Software that all depends on what Software you actually use. Some will bog it down and some will work in the background and be all but invisible.
here it all depends on who made the app and what mode it's being run in. Any Aggressive Scan is going to consume more system resources than a "Normal" Background Scan and different applications use different system resources.
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How does Asus Transformer Prime handle viruses, adware, spyware?