Many new tips and chalk have emerged in full force the last 5 years, many of which I would say are suspect as to whether their prices justify the performance of cheaper alternatives. Also, in regards to tips, for me its been more about the decline of quality of Le Pro tips than the improvement of layered tips that forced me to make a change. Right now ive been playing with Kamui Clear and Softs. Im miscuing alot lately and its making me lose alot of confidence in extreme draw, so I might be trying out new tips here in 2014.
I think that the biggest improvement in pool in the last 5 years has been live streaming. It existed prior to 5 years but it has made remarkable jumps in quality and availability.
Of the gadgets that ive tried and liked,
1) Alex brick jump cue made out of diamondwood (sp?).
2) Break Rak (is it older than 5 years? maybe)
3) Magic rack/slug doctor. Although I mainly use my delta 13.
4) that iphone app that tracks break speed is pretty interesting but of limited overall use beyond providing interesting data once in a while.