Give it a try. You can do that for
free. You won't have the full features but you will at least be able to see if it will run on your laptop. If you like the FPS and can adjust the settings to where you feel they are reasonable, it's worth a go until the next upgrade.
My personal opinion is that laptops are not meant for serious gaming. Serious gaming requires a serious GPU and most of those not only output major heat but require higher voltages as well.
If you want to play the games that place higher demands on your system, invest in a tower. The most beneficial feature of a tower? You can make modifications, and keep your system cool and stable. The best part, you can do it yourself.
Hope it works out for you pal. The more junkies we have, the better.