The phrase "impressive showcase" means a display or presentation of something that is very good, outstanding, or impressive. It suggests that the showcased item or performance is deserving of admiration and attention. Full definition
One of the most impressive showcases of this is the cutting - and - pasting of real - life text. (techradar.com)
The SEMA show is one of the most important specialty automotive items show in the world, over 120,000 companies from more than 100 countries come to this massive event, the 2007 edition received over 60,000 visitors, both from within the US and from abroad, save to say this is a very impressive showcase for such a special car as this DP7 Racing Gallardo GTR. (lambocars.com)
Despite the company and its partners making some incredibly impressive showcases over the past few years with its Unreal Engine 4 middleware, founder Tim Sweeney believes that the industry is still «two decades» away from videogames that are identical to the real world. (n4g.com)