Most budget TV's handle frame interpolation poorly, and if I'm calibrating a set I turn it off. Needless fluff they advertise to sell to units. CP is correct that you want a full array back lit as opposed to edge lit, but even then some full array's are shit and provide horrible uniformity. OLED is better, especially for off axis viewing, but some of the higher end LCD's can produce outstanding images as well.
Are most TV's good enough these days? It all depends on what you watch, where you watch and how much you watch. Budget sets are okay for bright lit rooms where you watch the occasional Hallmark Christmas movie. But if you have the budget, invest in a better TV.
TV's in somewhat of an order as I would typically recommend.
1) TCL's are good, higher series though.
2) Vizio, P Quantum series.
3) Samsung, Q80's and 90's (Prices will be dropping on the 80's this week.
4) Sony, X950's or A9's (Sales to be had on them as well). There will be black Friday prices, and typically all prices will drop.